Well, I test filled the 90 today. One of the xp3's pissed all over and my CPR refugium pump has exposed wires so I am running with one xp3 and two penguin 350 Hobbs with a big sponge filter. So far no leaks besides the one can. I plan on a fishless cycle and getting some plants going then growing out a chocolate in there for a while with some dither tetras.