I bought a 20 gal tall off craigslist that is drilled and plumbed with a 10 gal sump and a stand. I redid the sump because I didn't like the layout. I'm going to be using sand and rock and some old water from an established tank to speed up cycling, then I will be moving all livestock from my fluval spec V to the 20 gal and I will end the thread for the fluval spec V. I am having a problem with the spec V (I think it's leaking from the bottom).