Nanci B Posted September 29, 2021 Share Posted September 29, 2021 Hey folks! So as some of you know I am setting up a 75 and and had planned on moving the sponge filter to speed up the cycle, (which is overrun with green hair algae) and reusing the substrate from the smaller tank (and adding more new eco complete) to increase the beneficial bacteria in the new 75 However, I read somewhere that disturbing substrate will kill the beneficial bacteria colony and cause serious problems. Finally just discovered a hydra outbreak. I don’t know if anything in the old tank can be used, except the plants which I can dip. So my questions are: 1) pros and cons of reusing the substrate? 2] should I use the seeded sponge filter with algae in it? —I will of course remove as much algae as possible. I don’t know if there are hydra in the sponge. If anyone has ideas or has done this, I would love to hear from you! Link to comment Share on other sites More sharing options...
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