I’m actually in this process I’m not going bio active though. I am adding a nice water feature and will be using a homemade wood lid with RHP’s on it. I understand that all the aesthetics like waterfalls and pools will strictly be for viewing pleasure but I’m ok with that. I was actually playing around with the idea of adding a few guppies to the pond just for some tank interest anyone ever experimented with something like that. The tank is a 75 gallon six foot long tank so there will be plenty of space for it.