well i am happy to say that my sump prject has gone very well. there was only 2 modifications to th original design. my pump is rated at 450gph and the sump is handling it with ease. i also have had sucess with my pvc overflow pipe. i went from a 3/4 inch pipe to a 1.5 inch pipe to make sure it could handle the flow. it is currently setup to my 65 gallon with my emperor 400 still running. there are 3 ryukin and 1 pearlscale about 2 inches in length (no tail), and a sailfin pleco about 6 inches with tail. about a day after i setup the sump the water was crystal clear and has stayed that way for about a week now. i am currently enjoing not having to service my filter for what i hope will be 6 months due to how much filtering the sump is capable of. i will soon have a vid of the setup soon. i love my fish tank.