As listed in my main thread for this tank, I have a 230 gallon sump and an Ultima 1000 currently spec'd for filtration. As the cost difference between the 1000 and 2000 is only about $130 (plus the bigger pump for the 2000), I'm looking for some knowledgeable opinions on whether the Ultima II 2000 might be a better option to suit my primary goal of keeping maintenance down. There is also a $140 option on either model to have a 2" valve instead of the standard 1-1/2" valve. I'm presuming the 2" valve is the way to go. The builder's sketch is included below. Thanks for everyone's help.