M MFM Piranha MFK Member Jun 22, 2009 2,790 78 81 SD Sep 20, 2009 #1 I have these all over my tank glass, and I think they are hydra. How cand I kill them without taking out my 12 cichla and 1 pleco?? Here is a picture:
I have these all over my tank glass, and I think they are hydra. How cand I kill them without taking out my 12 cichla and 1 pleco?? Here is a picture:
