How to get rid of cotton or web-like growth in the tank - The Planted Tank Forum
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post #1 of 4 (permalink) Old 07-11-2018, 10:47 PM Thread Starter
Algae Grower
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How to get rid of cotton or web-like growth in the tank

So I've been away from home for a while and I got some cotton or bunched up spiderweb looking growth all over my tank.

I'm not sure if it's algae, fungus or whatever else.

Only inhabitants in this tank are caridina shrimps, so how would I go about treating it?

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post #2 of 4 (permalink) Old 07-11-2018, 11:45 PM
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looks like fungus to me. usually shows up with dead or decaying matter. make sure you remove any dead plants or pets and manually remove the fungus. a water change would help too

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post #3 of 4 (permalink) Old 07-12-2018, 12:19 AM
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Looks like the stuff that grows on new wood for the tank but since it is on rocks and plants, must be something different. For the stuff on new wood, I just let it go and the food supply runs out and it goes away. But for this, I might first try to reduce the volume. Is it a sort that can be wound up on a small brush like a round round bristle brush like we might use to clean test tubes, etc.? Maybe try grabbing a bunch on an old toothbrush to pull it off, if it will without damage to the plants. Then when reduced, I would look at spraying something like peroxide to kill the remaining. Easy so not to get too much in the water to kill/damage plants or fish.
Of course, being home, you will be picking up the tank work a bit?? Nature has a way of finding our faults when we turn our head for a minute!
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post #4 of 4 (permalink) Old 07-12-2018, 07:54 AM
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I've never seen a fungus problem like that. Methylene blue will kill fungus although I don't know if it would have an impact on the shrimp. Usually fungus forms on dead or decaying matter. I've gotten fungus on wood before but never seen it grow all over the place. I would pull up the plants and manually remove as much fungus as possible. Put the plants in a bucket with Meth blue for a day or two and also treat the tank to make sure it's all gone. If you can move the shrimp out.
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