Have a 90g Pleco tank and would like to add some color with schooling fish on top. Was thinking some kind of small tetras perhaps glowlights, cardinals, bleeding hearts. Any suggestions?
White clouds are better if you want them actually closer to the top, tetras tend to stay lower- or mid-level in tha tank. Otherwise, don't overlook rasboras when you go scouting for new fish.
Most tetras are nervous and skittish sometimes, and so tend to stay in the lower levels. Danios? Mine tend to swim at the bottom about an hour after feeding time taking the corys and shrimp's food so you may not want these. Hatchets, and white cloud mountain minnows are a good choice, stay in the upper region 99% of the time. They are nice and small too.
Golden Wonder Panchax (1m;3f)? Larger than Hatchets (at 4") and don't just 'float' on the surface....although if you had room for hatchets and some tetras that would look great - certainly have a soft spot for hatchets :thm: