I would like to see information on flow through systems that anyone has put together including filtration or lack thereof. I know there are a number of differing opinions on flow through and would like to see what has worked for others out there. I'm pretty sure I've settled on an indoor tank setup at 1000-1500 gallons and will be a DIY plywood tank with viewing window, for somewhere around 10-15 koi. I know I will need to filter more or flow more through with that many fish, but I plan on doing a bottom drain to a settlement chamber to take out some of the fines from the bottom as well as a skimmer which may be where the overflow is housed along with a small pump to a shower tower or bog/flow through/moving bed type filter. I have also thought about the overflow being inside my settlement chamber as discussed in another thread. I really would appreciate detailed pictures, plans and suggestions!!!