I'm primarily a saltwater aquarist . . . But i've always wanted to setup an ecosystem tank incorporating native species of plants and fish from the everglades (which is 2 miles away - just over the levees from us). So, i'm selling my extra tanks and a neighbor loves Speck (Crappies) which he catches regularly in the glades and does fish fry's for the neighbors. He wants to buy one of my 90 g tanks and setup as a Crappie tank. I know, i know, Crappies aren't native . . . doesn't matter - it's natural now. Google searches turn up very little . . . My plan is: set-up the tank with a modified wet/dry using Algae turf scrubber lit (8hrs or less) + carbon bag as needed Use natural substrate gathered from our environment, along with native plants and materials. (sawgrass, spatterdock, etc) Cycle and add 4-5 crappies. Main pump will be a MagDrive 9.5 throttled back with lateral flow. Probably plumb return to a flow bar a few inches above the substrate or mid tank - opposite the return / overflow. Lighting will be 48" coralife with 10k and 6.5k bulbs. Temp will be maintained to the same as our canal (that leads to the glades). How little does the flow need to be - most FW tanks seem really stagnant and i'm thinking my Mag9.5 may be too much? Would he have to clean the ATS screen like saltwater screens - every week? Are there freshwater copepod-like organisms that would eat the algae? Depending on the plant's growth, perhaps the ATS will be unnecessary and just be an oxygenator. Any thoughts? Crossing my fingers that his wife gives him a thumbs up!