https://www1.fishersci.com/Coupon?ci...0636&details=Y
I plan on using the 5 gallong container on the very left in this photo. I have a few of these lying around and I think it is very good for the RDSB. Im planning on putting two 1/2 inch bulkheads in the cap (input and output). My question is, should I have the sand bed full all the way to the neck of this container? I think that would provide a small area of water that could be flushed clean and eliminate settling. OR, should I only fill the container up to the point that will maximize the water / sand interface (about 4 inches from the top) Thanks for the great idea! I cant wait to get this going on my tank!