infamous;2934981; said:pleco is about 10", Nandopsis haitiensis are 2-3", severums are 2" and 4", silver dollars are about 4". In the end i plan on keeping the pleco and a single or possibly a pair of the Nandopsis haitiensis.
You dont have too much filtration, your ok but you may have to move some of those fish soon Nandopsis haitiensis can get up to 35cm, or think about upgrading, I agree that too much water flow can be dangerous but water being turned over and filtered is ok!