Are there any fish or critters that will eat sponges? This sponge has been in my tank for years but seems to be growing more than I want. I figured it would stay in low light but seems to be coming out more. 
Sponge problem (1 Viewer)
- Thread starter Jake
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Venustus Angels definitely do, but tough to get them to eat anything else after they wipe all thr sponge out
Mathew0
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Some Nudibranchs claim to eat sponges. Also, not that easy to find. They're generally quite small, so might not be able to handle that big one. Of course, they'll run out of food once the sponge is gone.
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I am not sure how big the rock is they are attached to or the feasibility but I have heard several times that exposure to air kills sponges quite quickly.
"The most critical concern is that Sponge never be exposed to the air. If it is exposed to air out of the water, the air becomes trapped in the matrix of channels that line the inside of its sponge body, blocking the path for food to reach its cells."
"Most sponges (but not all) will die when exposed to air. No it is not an instant death. It may take a month or two. It will take several weeks ..."
"The most critical concern is that Sponge never be exposed to the air. If it is exposed to air out of the water, the air becomes trapped in the matrix of channels that line the inside of its sponge body, blocking the path for food to reach its cells."
"Most sponges (but not all) will die when exposed to air. No it is not an instant death. It may take a month or two. It will take several weeks ..."
OP
OP
It’s all part of my main rockwork so cannot be removed. I guess if it moves at the same rate as it has been it will consume my rock in about 5-6 years
I think I am just going to hope that it doesn’t keep spreading. I may try moving a power head to see if some direct flow may discourage growth
*****************DO NOT DO THIS WITHOUT RESEARCH*************
I seem to over think scenarios sometimes but would it be possible to use air line tubing and some lower psi compressure air to "inject" air into the sponges? i have 0 experience and 0 knowledge if the dying sponges would have any adverse affect on the tank. just simply throwing out the first place my mind went for a simple solution if there were no ill affects.
OP
OP
I know many are toxic I’ll probably leave them be if I don’t buy a new fish
I had the same sponge in one of my first tanks and was able to get rid of it by putting a glove on and just pushing it into the rock basically collapsing it. I can’t say 100% this is what did it, but they withered away after that and didn’t come back after months of growing out of control with this being all I did to it.
OP
OP
I have opened the blinds near the tank to allow sunlight to hit the sponge directly I can’t say for sure but I think it is slowly receding