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Old 09-02-2004, 06:42 PM   #1 (permalink)
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Default Perpetual Preservation System v.2004

Please see the newer version PPS v.2005





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Perpetual Preservation System v.2004 by Edward.

Many aquatic hobbyists are looking for this method that doesn't require large water changes. The reason may be time or size of tanks. This system also works with periodic and random water changes.

Entering elements proportionally allows one to perpetually preserve an optimum balance of nutrients. A fixed ratio of elements, dosed every day at very small quantity to maintain desired concentration in the water column. Twice a month or so, testing only for NO3 and PO4 determines what to dose the following month.
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Standard Dosing:
NO3 - 0.75
PO4 - 0.25
K - 1.00

Mg - 0.10
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If testing of water column gives elevated NO3 level, then switch to NO3-FREE Dosing:
NO3 - 0.00
PO4 - 0.25
K - 1.00

Mg - 0.10
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If testing of water column gives elevated PO4 level, then switch to PO4-FREE Dosing:
NO3 - 0.75
PO4 - 0.00
K - 1.00

Mg - 0.10
--------------------
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Solutions can be made as follow, K2SO4, KNO3, KH2PO4, MgSO4, CaCl2 and TE (trace elements).

Standard solution
0.75:0.25:1.00 (NO3:PO4:K)
KNO3 - 20.38 g
KH2PO4 - 5.97 g
K2SO4 - 15.74 g
in 500ml


NO3-FREE solution
0.00:0.25:1.00 (NO3:PO4:K)
KNO3 - 0.00 g
KH2PO4 - 5.97
K2SO4 - 33.30 g
in 500ml


PO4-FREE solution
0.75:0.00:1.00 (NO3:PO4:K)
KNO3 - 20.38 g
KH2PO4 - 0.00 g
K2SO4 - 19.56 g
in 500ml


Ca solution (for RO users only)
0.2 (Ca)
CaCl2 - 12.22 g (CaCl2 2H2O, Calcium Chloride Dihydrate)
in 500ml

Mg solution
0.1 (Mg)
MgSO4 - 16.90 g
in 500ml

These solutions make rated ppm at 3 ml / 100 l. Example: solution 0.75:0.25:1.0 at 3 ml in 100 liters make 0.75 ppm NO3, 0.25 ppm PO4 and 1.0 ppm K.
Dosing the same amount of ml, NO3:PO4:K:Mg solutions, make the most balanced nutrient spectrum.
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How to start:

1. Test for NO3 and PO4, make notes.

2. Keep dosing every day Standard and Mg solutions for 1 week. Test for NO3 and PO4 at the end of the week.

- If the ratio and levels are acceptable then continue the same dosing following week.
- If the levels are high, start dosing less ml the following week.
- If the ratio is wrong, discontinue the Standard solution and replace it with NO3-FREE or PO4-FREE solution. Keep dosing the following week then test again.

For 50 gallon tank at 1 Wpg Watt per gallon, dosing 3 ml every day keeps nutrients steady. For 130 gallon tank at 3 Wpg Watt per gallon, dosing 12 ml.

3. TE Trace elements is a separate issue. The best way is by observing plants for signs of deficiency, pale new growth. If that happens increase daily dose of the TE solution. Dosing 5 drops a day in 130 gallon tank at 3 Wpg Watt per gallon does the job. Overdosing is not beneficial.

TE Solution
0.1 (Fe)
TE - 23.81 g
in 500 ml

The CSM-B or Plant-ProdŽ Chelated Micronutrient Mix http://www.plantprod.com/catalogue/0...nutrients.html can be used.

4. To increase KH use CaCO3.

5.To increase Ca use CaSO4, Mg use MgSO4. Ratio Ca:Mg of 4:1 is done by dosing a mix of dry 1.5 g CaSO4 and 1.0 g of MgSO4.

This system is efficient and easy to do.
Thank you for your time,
Edward

Last edited by Edward; 01-20-2005 at 07:59 AM..
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Old 09-02-2004, 07:04 PM   #2 (permalink)
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Adding 3 parts KNO3, 1 part KH2PO4, and 2 parts K2SO4 to any volume of water will give you approximately the same percentage ratio of ingredients:

NO3: 37.211%
PO4: 12.714%
K+: 50.07%
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Old 09-02-2004, 08:10 PM   #3 (permalink)
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Quote:
Originally Posted by Error
Adding 3 parts KNO3, 1 part KH2PO4, and 2 parts K2SO4 to any volume of water will give you approximately the same percentage ratio of ingredients
Yes, that's the same ratio, dry weight, 3:1:2.
How do you like it? How do you use it?
Can you give more details, your experience.

Thank you
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Old 09-02-2004, 09:09 PM   #4 (permalink)
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I have been using it since I came across the original thread, though I erroneously added 4 parts K2SO4 instead of 2 for the first couple of dosings, which is why I posted my last post

I literally added 1.00:.75:.25 with dry ingredients, gave me a lot more K+ than I wanted. I think N crashed as a result.

Growth seems to be ramping up a little...it's too early to tell, I think.
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Old 09-02-2004, 09:11 PM   #5 (permalink)
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Also, I am having trouble gauging traces. Plus, it's a soil substrate (as far as I can tell, it's entirely depleted). 5.5wpg w/CO2...and I dose the same ratio but dry.
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Old 09-02-2004, 10:31 PM   #6 (permalink)
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How are you measuring these grams of yours? Not many people have scales...I sure don't. Are you using spoons of some variety?

Also, could someone make a solution using just the 3:1:2 (say, teaspoons) ratio in 500 ml? How would one know how much to dose?
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Old 09-03-2004, 05:03 AM   #7 (permalink)
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Error, I just bought a gram scale that should come next week. I got it from a "store" on ebay that deals specifically in scales. There are a lot of pocket digital gram scales out there. Many will do up to 500g, are acurate to .10g and mine was less than $30 with shipping. You can get cheaper ones that weigh less in the $20 range. Sorry that sounds like and infomercial, I have never used one before.

YOu could use the 3:1:2 ratio with any measurments. If you want to use teaspoons then use Chuck Gadd's calculator and figure out the pm per ml added to your tank. You would have to figure out each nutrient individually but that would work fine.
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Old 09-03-2004, 07:03 AM   #8 (permalink)
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Quote:
Originally Posted by Error
Also, I am having trouble gauging traces. 5.5wpg w/CO2...and I dose the same ratio but dry.
Trace elements dosing is individual. Some people like more, some less. There is many commercial products available. Personally I use Plant-ProdŽ Chelated Micronutrient Mix, http://www.plantprod.com/catalogue/0...nutrients.html ,
Mn - 2.00 %
Fe - 7.00 %
Zn - 0.40 %
Cu - 0.10 %
B - 1.30 %
Mo - 0.06 %

24 g - in 500 ml makes 0.1 ppm Fe at 3 ml / 100 l, same as all my solutions

Dosing regardless the size of tank, 1 drop a day up to 1 Watt per gallon, and 4 drops a day at 4 Watt per gallon. Watching the colour of plants gives good indication how much to dose.
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Old 09-03-2004, 07:43 AM   #9 (permalink)
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Quote:
Originally Posted by Error
How are you measuring these grams of yours? Not many people have scales...I sure don't. Are you using spoons of some variety?
I don't use spoons because inaccurate results. Some dry chemicals come as powder, some as pellets. It's best to use a digital scale. Any $30 postal scale will do. Try search on Sunbeam Digital Electronic Postal Scale Item Number 478657. Staples, Business Depot and so on.

How to make the 5.97 g of KH2PO4?
Dissolve 50 g of KH2PO4 in 500 ml. Take 59.71 ml of this solution, which is exactly 5.97 g of KH2PO4.

Quote:
Also, could someone make a solution using just the 3:1:2 (say, teaspoons) ratio in 500 ml?
As long as you don't go over the maximum solubility limitation.
Maximum solubility / 100ml
KNO3 35.7g
KH2PO4 22.0g
K2SO4 12.0g
MgSO4 35.6g

The scale is no problem. If anyone needs, I can send all the dry weighted nutrients by mail. Send me a message, let me know. You can add the water.
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Old 09-04-2004, 07:26 PM   #10 (permalink)
 
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Edward:
Try non CO2 tanks, no water changes for years.
The lower the lighting, the more nutrient "wiggle" room you will have.
I know some of your tank have low light.

I've seen a tank that did not have any changes for over 2 years with Discus that were breeding.

The inputs will be fish food/plant decay and the export will be plant cuttings/filter cleanings.

You can add something like SeaChem Equibrium and some tiny amounts of KNO3/KH2PO4 to make up for low fish loads.

But light is the best method to slow down rates and allow for the plants time to take in enough nutrients to produce good healthly growth.

Regards,
Tom Barr
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