Hello, I have 125g freshwater tropical tank with community fish/ live-bearers and plants. I had blue-green algae clumps and ended up taking the rocks out and cleaning. I read that a ph slightly below 7 discourage's it and wondered if this was true if anyone may know? My fish are healthy, water parameters good (ph about 7.5) and plants do ok when not being eaten. Normal green algae is pretty minor in the tank. Thanks in advance.