Just wanted to say hello. I'm totally new to this (about time right?). I'll be starting a system in a few weeks and it's going to be interesting. I have a decorative (until now) in ground pond that I'm going to use as my fish tank. Because this tank is below ground it's going to make it impossible to drain the fish tank into a sump. My solution is to pump from the FT to the Grow bed and to let that flow into a "sump" that flows into the FT. If I start with the "sump" full, and match up the drain of the sump into the FT with the output of the FT to GB pump it should work out, but I suspect there are many problems with this solution. Alternative plans would be welcome. I've gotten lots of great information here so far.