Thank you. I was planning to use this as a frag tank. It's going to have 1 3-stripe damsel fish and a few snails.
I guess I'll try it. The tank was free and the 10g frag tank isn't big enough anymore. I'll just cycle it and then see how a couple zoa frags do for a month. If they are still alive, I'll stock it with a few more corals and see how they do for another month.
I've done the vinegar wash - actually it was practically a vinegar soak because I poured a little in the tank with about 1/2g of water. I'm sure it was more like a 1:5 solution instead of the recommended 1:10 solution.
The vinegar bottle slipped and I sloshed a whole bunch in the tank - so the heck with it!! Washed it real good with a new sponge. got into all the corners and up under the top rim. Rinsed in hot water - a lot of hot water.
Then I did the bleach wash with 1:10 solution. Rinsed in a lot of hot water.
Filled it up and let the whole thing sit overnight with tap water up to the top rim. Pumped it out this morning with a powerhead and then started over on the vinegar wash. 1:10 solution this time because I actually measured it out. Lots of rinsing with hot water. Then I did the bleach bath again. More hot rinsing.
I dried it with a paper towels and a hair dryer. It's sitting here dry as a bone now. I guess there's nothing left to do - fill 'er up with RO water and salt.