I'm still in the design/gathering parts/building phase of this project.

My fish tanks are housed in a 9'X17' insulated room of my barn. I have 5=275 gallon IBC's. They all have SLO that goes to a combined 2" outlet. One of the IBC's can be converted to a sump (incase the drain line to the greenhouse freezes).

My greenhouse is about 180' away from the fish room. It is 20'Wx40'L. I have not yet connected it to the fish room. I hope to get the trench done this fall. Inside, my…