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ONE MORE VOTE FOR SEACHEM EXCEL!!

Here is a synopsis of my experience with using Excel for various types on algae I had in my tank.

April 20, 2008
Excel Treatment
Roy's 45 Gallon Tall Tank

Encouraged by Erik's and Larry's experiences with Luis Navarro's
recommendation for using Excel I decided to try it. Here are the results I experienced.

Day 1
20 % Water Change; PH=6.8; CO2=19ppm; KH=4; DH=4; Treating as a 40 gallon

Initiated treatment with two times (2X) normal initial dose, eight teaspoons (8 tsp) total. Water become slightly cloudy, fish activity declined but no fish showed any distress; plants, which were pearling (gassing) slightly prior to treatment, gassed more heavily about 3 hours after treatment. Fish ate normally.

Algae: Green algae (GA) and green spot algae (GSA) on glass; dark algae discoloration on older leaves of Bolbitis and Java Fern Lace; light infestation of hair algae (HA) in Bacopa, Rotala, Hemianthus micranthemoides and others. The Rotala also has reddish brown algae (RBA) discoloration (like dusted with rust, not BBA) on stems along with slight hair algae (HA) directly below the reflector.

Day 2
PH=6.6; CO2=30ppm

Treated the tank with one times (1X) normal initial dose, four teaspoons (4 tsp) total. Water which had mostly cleared overnight again became slightly cloudy. Fish activity declined but not as much as Day 1 no distress noted. Some increase in plant gassing occurred but not as much as Day 1. Fish ate normally.

Algae: No change in GA or GSA on glass. Dark algae discoloration on the older leaves of the Bolbitis may be lighter, but not the older leaves of the Java Fern. No change in HA or RBA.

Day 3
PH=6.6; CO2=30ppm

Treated the tank with one times (1X) normal initial dose, four teaspoons (4 tsp) total. Water which had mostly cleared overnight did not become cloudy. Fish activity did not appear to decline. No notable increase in plant gassing. Fish ate normally.

Algae: No change in GA or GSA on glass. Dark algae discoloration on older leaves of Bolbitis seems lighter but not on Java Fern. HA does not seem to be as green at Day 1 and does not seem to be growing.

Day 4
PH=6.6; CO2=30ppm

Treated the tank with one times (1X) normal initial dose, four teaspoons (4 tsp) total. Water which remained clear yesterday and overnight did not become cloudy. Fish activity did not appear to decline. No notable increase in plant gassing. Fish ate normally.

Algae: GA or GSA on glass seems less green. The dark algae discoloration on older leaves of Bolbitis is definitely lighter but not gone, the discoloration on the older Java Fern leaves appears unchanged. HA has gone from green strands to very light green in some cases white strands with less thickness to the strand, it appears to be dying. RBA on the Rotala is definitely starting to disappear, some HA also on the Rotala is still green.

Day 5
PH=6.6; CO2=30ppm

Treated the aquarium with one times (1X) normal initial dose, four teaspoons (4 tsp) total. Water which remained clear yesterday and overnight did not become cloudy. Fish activity did not appear to decline. No notable increase in plant gassing. Fish ate normally.

Algae: GA or GSA on glass seems same as yesterday, but does not appear to be growing as quickly. The dark algae discoloration on older leaves of Bolbitis is the same as yesterday as is the discoloration on the older Java Fern leaves. HA seems to have experienced the largest change. Except on some Hemianthus micranthemoides directly under the reflector and on some
Ceratophyllum demersum (Hornwort) that is floating under the reflector where it is still green, it has gone from green strands to light green or white strands with less thickness to the strand; it appears to be dying or dead in most areas. RBA on the Rotala is almost undetectable, the HA also on the Rotala is greatly diminished.

Day 6
PH=6.6; CO2=30ppm

Treated the tank with one times (1X) normal initial dose, four teaspoons (4 tsp) total. Water which remained clear yesterday and overnight did not become cloudy. Fish activity did not appear to decline. No notable increase in plant gassing. Fish ate normally.

Algae: GA or GSA on glass seems same as yesterday, but does not appear to be growing as quickly. The dark algae discoloration on older leaves of Bolbitis is the same as yesterday as is the discoloration on the older Java Fern leaves. HA seems to be about the same as yesterday. Very slight green infestations continue on the Hemianthus micranthemoides and on some
Bolbitis directly under the reflector and on some Ceratophyllum demersum (Hornwort) that is floating under the reflector. The HA has disappeared from most of the areas it was infesting. RBA on the Rotala is almost undetectable or may be gone (it is hard to tell) and some very slight traces of HA remain on the Rotala directly under the reflector but 95% of the original amount has disappeared.

Day 7
PH=6.6; CO2=30ppm

Treated the aquarium with one times (1X) normal initial dose, four teaspoons (4 tsp) total. Water which remained clear yesterday and overnight did not become cloudy. Fish activity did not appear to decline. No notable increase in plant gassing. Fish ate normally.

Algae: GA or GSA on glass seems same as yesterday, but does not appear to be growing as quickly. The dark algae discoloration on older leaves of Bolbitis, although dramatically reduced from initial treatment, is the same as yesterday as is the discoloration on the older Java Fern leaves. HA seems to be about the same as yesterday. Very slight green infestations continue on the Hemianthus micranthemoides and on some Bolbitis directly under the reflector and on some Ceratophyllum demersum (Hornwort) that is floating under the reflector. The HA has disappeared from most of the areas it was infesting. RBA on the Rotala appears to be gone (it is hard to tell) and some very slight traces of HA remain on the Rotala directly under the reflector but 95% of the original amount has disappeared.

Day 8
PH=6.6; CO2=30ppm

I preformed a 50% water change, treated with one times (1X) normal initial dose, four teaspoons (4 tsp) total. Water which had remained clear yesterday and overnight became cloudy. Fish activity did not appear to decline. A notable increase in plant gassing occurred. Fish ate normally.

Algae: GA or GSA on glass seems same as yesterday, removed manually. The dark algae discoloration on older leaves of Bolbitis, although dramatically reduced from initial treatment, is the same as yesterday as is the discoloration on the older Java Fern leaves. HA seems to be about the same as yesterday. The HA has disappeared from most of the areas it was infesting. Very slight green infestations continue on the Ceratophyllum demersum (Hornwort), and on some duckweed all areas are directly under the reflector. RBA on the Rotala appears to be gone and some very slight traces of HA remain on the Rotala directly under the reflector. All and all, I would call the treatment a success.

I would call the treatment a success. Overall, I would estimate that 95%+ of the algae that was on the plants has disappeared. What remains is unnoticeable unless I am actually looking for it. The green algae and green spot algae on the glass was basically unaffected by the treatment, however it did not grow as quickly during the treatment as it had beforehand.

The treatment had minimum effects on the fish and plants. The fish showed no distress during the treatment, although periods of reduced activity were noted, usually shortly after the addition of the Excel.

The plants did show some signs of damage from the treatment, especially in the last two or three days. The tips of the Vallisneria (extending about 4" from tip down) become clear, soft, showed signs of cellular deterioration, and had to be removed. One of my two patches of Cryptocoryne wendtii v. 'Tropica' (Bronze Wendtii) has experienced a "melt down" but the other
appears unaffected. And finally the Ceratophyllum demersum (Hornwort) experienced the same cellular deterioration as the Vallisneria and some small areas became soft and fell apart.

From this point on, I will do the recommended Excel treatment and see if the alga returns to previous levels.

Update May 28th, 2008
To date I continue to treat with the normal recommended dosage of Excel. I have experienced no reappearance of the hair algae (HA) and the only algae I have to deal with is the normal green algae and green spot algae that will grow on the glass. But even that algae grows at about 1/3 the rate it did before I started using Excel. No fish losses and the Val and hornwort have fully recovered as have the crypts. Excel is an excellent product. I use it in conjunction with CO2 injection and plants have never looked better. My Anubias are putting out 1-2 leaves a week, and my Aponogetum has put up a flower stem. Highly recommended!!
 

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I used double the initial and double the daily dose of Excel to rid my tank of algae problems in about 8 days. I did not lose any fish. See Permalink #193, page 20 this thread for the play by play details.
 

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Hi Indiana Gardener,

Sorry, Flourish (Comprehensive) will not decrease your Hair Algae with increased dosage, in fact it may make it worse. Flourish Excel is the product that contains the glutaraldehyde polymers that provide the algaecide properties.
 

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just a question, ive been reading almost the whole thread and i think i havent read a post concerning how to use excel with an existing pressurised CO2 set up. anyway i would like to know if i have to dial back the CO2(around 4bps) when i use the excel to nuke the bba in my tank. thanks.
Hi gooey,

I dose Excel (actually I use Glutaraldehyde now) in conjunction with pressurized CO2. Although Excel adds carbon to an aquarium, it is not in the form of carbon dioxide (CO2). I find that using Excel (Glut) with pressurized CO2 does not cause any problems with my fish or plants.
 

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Hi Red_Rose,

Some types of hair/thread algae seem to respond better to treatment than others. I have not had any problems with Excel / Glut affecting any of my fish. My val however, which grew normally prior to treatment now is stunted. The treatment is definitely worth trying however.
 

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Hi Red_Rose,

I found that for Excel (and Glut) to be effective as an algaecide, 2X dosage is what worked for me. Dosing at a lower dosage did not have the algaecide effect for me.
 

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Hi SvenBoogie,

Excell has done wonders for me dealing with algae issues, but it does not solve the underlying cause. I don't know what you are doing for light (watts, duration, etc) but you may want to rethink your photoperiod and cut it back some. I usually have problems with hair algae if I am providing too much light or too long a photoperiod.
 

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Hi snail_chen,

It is true that Excel is a source for CO2, but CO2 does not rid an aquarium of algae. Excel also has "undocumented" algaecide properties due to the active ingredient Glutaraldehyde. This thread deals with algaecide properties of Excel. If you are interested in Glutaraldehyde check out the post here.
 

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Hi cwhite67,

1) Let's see, 1000 ml per liter

2) 2000 ml in two liters

3) 1.5% of 2000 ml is 30 ml

4) If your Glut was 100% pure you would use 30 ml in 1970 ml of water. However since you are using 50% concentration Glut; to get a 1.5% percent concentration you would need 60 ml of Glut in 1940 ml of water.
 

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Hi Outtasteam,

Algae is typically not brown. The condition called "Brown Algae" is usually caused by Diatoms, which are actually a silica based organism that grows on the surface of the glass, hardscape and plants. Regular water changes and adding Otocinclus to the aquarium typically resolves the problem.

I have experienced "brown water" in the past when I added new driftwood to an aquarium. It leached tannins for about 6 months before the leaching process was not as noticeable; and that was with weekly 33% water changes.
 

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Hi justjulie,

First, I am sorry about your loss. When I lose fish I always feel badly but I try to use it as a learning experience so I don't repeat my mistakes.

If you had read the whole thread, I think you would have seen that most of us dose at no more than 2X the "Daily" dosage level (2 capfuls per 50 gallons). I have dosed as high as 2 capfuls per 10 gallons (2X Initial/Water Change) dosage but my fish show signs of distress when I do.

I think the only post in the whole thread that says "5X" is #257. However, doing the math would show that if he is dosing 6 capfuls for 60 gallons then he is dosing 1X the Initial/Water Change dosage level.

Again, sorry for your loss.
 

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Hi rssr1979,

You can continue to dose your ferts as normal when doing the Excel treatment.
 

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Hi krcsasha,

I am glad the Excel, Cidex, Glutaraldehyde worked for you. FYI I don't speak Russian but this is an English only site so I don't have to. lol
 

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Hi Sophie and Mom,

This thread deals with using Excel to control algae. That said, I can tell you that Excel does kill hair algae.

Typically I only have an issue with hair algae when I have a new tank going through the nitrogen cycle and my ammonia levels are high; have you checked your water parameters lately? Also the longer hours of daylight could be having some effect. SAE are a good biological control for hair algae, especially if I weaken it by dosing Excel.
 

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Hi Imi,

No I don't believe that it is 'simply an algaecide'.

At normal dosage levels I see minimal (if any) algaecide properties; but my plants grow better with the additional available carbon molecules.

However at 2X the recommended daily dosage the algaecide properties become more evident.

Tom Barr is doing some research on this subject as we speak, more information should become available in a month or two.
 

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Hi Barbels,

Yes, Excel / Metricide / Glutaraldehyde will kill BBA. I dose Excel strength glutaraldehyde. I dose the recommended 'Initial Dose' after weekly water changes and 2X the "Daily Dose" all other days.

Although Excel / glutaraldehyde do kill BBA the small 'tufts' remain unless removed. I keep an Siamese Algae Eater (SAE / Crossocheilus oblongus or syn. Crossocheilus siamensis) in each of my tanks. They are not very effective against healthy BBA they do a great job eating BBA that has been weakened by the treatment above.

I currently have no BBA in any of my tanks.
 

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Hi alanle,

Although your comment really does not follow the subject of the thread of using Excel (glutaraldehyde) I agree there are other methods including hydrogen peroxide (H2O2) that can be effective in treating some types of algae.
 
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