I currently have a 55 gallon tank with wild-type Neocaridina davidi, pearl gourami, britlenose pleco, about 12 harlequin rasboras and a school of otto cats. The tank is heavily planted along with driftwood and rocks. I currently have a hair algae problem that Flagfish can solve and my other attemps have not worked. I have had no problems with wild type (opaque) varieties since fish seem to ignore them and I have a breeding population. I have read that flagfish can be inconsistent in their behavior and I wanted support before making the decision of buying a female due to their lower aggression.