I have 6 glowlight tetras, 4 neon tetras, 6 lemon tetras, 1 zebra danio (I had 4, 3 were put in 26 ltr tank to be treated for fungus, and I can't catch this little bugger) I returned the 3 to the shop as they were attack ing my cherry shrimp, I have just introduced 3 otocinclus catfish (1 I...