I'm back again with the topic of glass fish ;D They have glass catfish now in my pet store. They are so cute. I read they may grow up to 6" but usually much smaller in aquaria. I also read they prefer schools of at least 3. Considering their size, and the fact that right now I have 2 angels, 12 neons, and 1 Chinese alage eater - I know I cannot get a school of the glass catfish. Would it hurt this type of fish if I bought only 2 of them? I can't resist this transparent fish! It looks so beautiful! Be honest if you think my tank will be overcrowded with this new fish. (My tank is 30 gallons in volume.) Thanks.