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I also have this "white fuzz" it looks like on several of my plants and seems to be spreading. I first noticed it on 1 plant a few days ago and I reached in the tank and just pulled it off the leave and it was just slimey, really didn't think much of it but today after studying my tank I began to notice a bunch more and I (again) started reaching in and pulling out what I could where it had clumped up pretty good on some of the leaves. I took several pictures but only managed to get one that was focused enough to share here. Take a loof to the left of the two large stalks on this Water Wisteria, (link below) just to the left and on the leaves you can see a white blob, that is whats spreading.



Assuming it is fungus of some sort I have also added Aquarium Salt and I also picked up a bottle of Mardel Maroxy, it says it's for True fungal infections of fish & eggs, I'm hoping it will (or the salt) clear this up in my tank.

If anyone has any other ideas that I might try, I'm all ears! My worry is that whatever this is will consume my plants to an extent that they will not be able to recover fully resulting in a major prune back which I would hate to have to do again.
 

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After adding the Mardel Maroxy, my tank seemed to really be unaffected and even had MORE of this fungus. I picked up a bottle of "Fungus Eliminator" made by Jungle Labs ( www.junglelabs.com ) and this morning there is "less" of this fungus in my tank. It's not completely gone but it definately seems like it's being effected. The bottle says to dose again if needed after 4 days and perform a 25% water change prior to dosing.
Normally wouldn't post about this till it's definately worked but wanted to let those of you know what seems to be working for me at least so perhaps if your situation isn't improving you may try it too. I have had no adverse effects to my plants or fish using this product either (so far) although it does say "Some live plants may be sensitive to this product" on th bottle.
It will turn your water yellow (fair warning) but will dissapate over night.
 

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I ended up getting a slight tank leak and ended up buying another tank all together, however during this (worst case scenario) process I decided to go ahead and literally "wash" the fuzz off my plants. I used a 25% bleach to water solution and set the plants in there for about 4 minutes.
I then rinsed them under tap water for a minute and then placed them in a tub of fresh water to "soak" for about 5 minutes. I took this time to clean some of the seriously effected plants with a toothe brush and again rinse under regular cold tap water. Some of my plants required some pruning and others were so full of this "slimey fuzz" that I just ended up getting rid of them.
After this I placed them all in a 5 gal pail of dechlorinated water and let them soak for about 15 minutes before placing them back in the tank. My water wisteria didn't hold up well at all, however my water sprite seems as if there were never an issue. My swords are as if they never went through any ordeal at all. If you have thick stemmed hearty plants and nothing else works this may be a solution, however I will admit I am not so sure I would have gone this far had my tank itself not started leaking on the floor. :heh:
As far as "what" this stuff is I have no idea, I am assuming it's some sort of a fungus and many say it sounds similar to what happens if you over feed but I am almost certain this is not the case because I at no point seen this "fungus" growing anywhere but on the plants themselves.
I'm monitoring my plants and studying the tank daily to see if this stuff pops back up, right now everything looks good. Be sure and post results though about what comes of your "treatments".
 

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I am not sure what exactly it is but I am noticing it "slightly" with my new tank now too. I was wondering if perhaps it was something to do with a "new tank" type syndrome but that wouldn't make sense since my other aquarium had been established for some time. However here is what I have come up with since setting up my newest tank.
60 Gal tank (lightly planted)
EcoComplete substrate 70 lbs
1.8 WPG ( yesterday upgraded to 6.12 WPG)
Pressurized Co2 (Indicator is always green and I dont shut it off @ night)
30 varioius Tetra's
Fluval 4 In-tank Filter
Over back of tank Bio Filter

I originally setup the tank with the NEW substraight (didn't use the old gravel at all) I added the reccommended dosage of Aquarium Salt, treated it with a bacteria suppliment, added a little Floyurish Excell & the regular Flourish Plant Suppliment according to bottle dosage reccommendations. Within days I noticed a Algae bloom starting (green water) and did a 25% water change, followed by a 40% water change the following day. The tank seemed to clear up and was fine. I didn't add anymore nutrients during the water cycles because I figured I had probably already had too much nutrients in my water with the EcoComplete and few plants. I have not (about a week now) added anymore plant suppliment and have done regular water cycles of 50% weekly and sometimes during the week I would remove about 5 gallons and replace it. I'm seeing an increased amount of "waste" I assume from the fish in my gravel that the plants are unable to use and I am HOPING that this will stabalize when my new plants arrive. I ordered a 48 plant assortment online and am just waiting for them to arrive. Back to my hypothesis here with setting up the new tank, and all of the problems I had with the last is this.... Is all of this possibly resulting from my tank of been to "rich" having excess nutrients?
Is there another avenue I could persue? I am starting to see very fine pieces of this "FUZZ" again on some of my fine "hair like" plants and it's definately white. I have recently treated my tank with a algae remover just incase this stuff is algae but my gut says it is not.
Looking back, I also noticed this stuff pop up after I had heavily pruned back my plants and performed a mojor water change after algae got out of control in my first tank. This makes me wonder if the initial cause might have been nutrient related.
Any ideas are welcomed, I'm hesitant with adding my new plants if this stuff is going to consume them too, and washing EcoComplete in bleach just doesn't seem logical, or I would start from scratch and not add supplimnets at all till the plants asked for them.
:confused:
 

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I really do not no much about the white algae or fungus, but doesn't fungus only grow on dead things? It if is on plants (ie. living matter), I wouldn't think it would be a fungus, but more likely algae that appears white based on the lighting of the tank.
I believe I have figured out what my problem is. I think the scenario I am experiencing is directly related to hard water, and the Co2 enrichment somewhat. I have been using pressurized C02 for about a month and after setting it up (used to use yeast setup) I started noticing this "fuzz" much more. After several conversations with my LFS I bought the Mardel 5 in 1 test strips which enabled me to take water hardness tests as well. Previously I had only tested for Ammonia, Nitrate, Nitrite, and PH which comes with the API Master Test Kit.
After testing my water I found out that the water hardness was in excess of 425 ppm and the Alkalinity / Buffering capacity was indicating it was between the 240 - 300 colors on the test strip. I did some searching online in google and found this:
"The reason your plants are degenerating is the hard water. When the water has a high ph and is hard, nutrients don't stay in the water long enough for the plants to use them. They evaporate out quickly and the plants are unable to use the nutrients. So making the ph and the water softer is the first steps in a successful planted aquarium."
I now am starting to think that perhaps the water is too hard for the majority of my stemmed plants and they are unable to properly feed from there roots, eventually they start decaying and with my lighting and C02 enrichment the tank is growing all kinds of this "fuzz" because essentially while many of my plant leaves are able to pull some nutrients out of the water itself the plant stems / roots are decaying & dead enabling this fungus growth and explaining why nothing I try seems to really work.
I'm going to try purchasing 20 gallons of RO water from my LFS and completely setting up my tank all over. I have a 55 Gal tank I will add some RO water too and place the plants in my existing tank in there to see how they do over the next couple weeks and if they show signs of clearing up and coming back I will add them to the tank again. Otherwise I'm going to give in and start over with new plants and a completely new setup using RO water. I'm going down to my LFS today to order a RO filter today and start the process of genuinely softening my water.
Seems the fish are able to adapt to the harder water where allot of my plants are not. After the decay sets in with the plants that cannot handle the hard water this white stuff starts growing and eventually contaminating everything. Water changes make the tank "look" decent but the problem, at least for me (I believe) is the water itself.
Has anyone else heard of this before? Does this sound like a plausible cause for what is happening?
I've been trying to treat the "fuzz" when I'm starting to think the original issue started with the water itself. :confused:
 

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Not sure really, I've looked at a few online and will see what is available locally. I don't have a preference really as long as my water's good and the problem goes away I'll be happy. I will definitely update after a few weeks and let everyone know what turns out, at least for my case.
 

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Well I have had enough time go bye now I have had to prune back my tanks a few times and periodically I do still get some of this "fuzz" but nothing like what I was experiencing before. I have noticed that is I let my Co2 get too high it does seem to increase whatever this is. I havent seen anything like what I had experienced in the past however and havent had to break the tank down since that last time.
My biggest issue it seems now is algae, I've got algae growing on my gravel and tank glass, I scrub it and vacuum what I can but it's a weekly chore. Anyways not going to get this off topic.

I never figured out what the white Fuzz was but for the most part it's gone, and when I see anything resembling it I pull it out immediately.
 
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