The cardinals are on my list of fish to get :-) Great minds think alike! (Well, I hope I'm as great at this as I aspire to be). Just ordered a new tank... mine was getting too complicated to set up starting with bare bones. I ordered a 16 gallon nano cube with all-in-one filtration/heater. I've ordered dry rock and will purchase about 5-8 lbs. live rock from the local pet store, I also got a test kit that tests 9 different elements in the water, as well as a kit called "AquaBella BioEnzyme Salt Water Treatment System" (it has great reviews on several sites and guarantees no water changes for a year- if you don't have corals), ordered a powerhead, air pump, salt mix... and I think that's it- already have the sand and hydrometer and extra heater (well two actually- a 50 watt and a 200 watt in addition to the 50 watt that comes with the cube. So far I'm in to this about $250 and just need a few pieces of live rock with some coraline algae and I'll be set to propogate a tank and eventually add fish and in several months I'll be ready to upgrade lighting and/or tank and start with corals:-) Your pics inspire!