Maybe a dumb question...Well my teachers used to say no question is a dumb question haha anyways real fast question regarding the Marimo balls, is there actually a limit as to how many can be in a tank? I'm not planning on starting a colony of them, I was just thinking maybe 5-6 in my 30 gallon community tank for looks and of course the added benefits. And I'm simply talking golf ball sized unless they decide to be mutant and grow to beyond tennis ball size very fast. But I just wasn't sure if too many had some form of adverse side effects! Thanks!!