And the scene is set: You need a QT tank fast. You eyeball the Bacteria in a Bottle product sitting on your shelf that you've been afraid to try. Can you really just "add a fish"? Let's find out. The first four up are usually obtainable locally at places like Petco and Petsmart. These were obtained from my local Petco. Stability - Seachem BIO-Spira - Instant Ocean Cycle - Nutrafin/Hagen Quick Start - API I figured 4 was as much as I could handle at a time. Equipment: 10-gallon tanks filled with Instant Ocean Salt. Hydra-Aquatics Bio Sponge Ammonia colorimeter. Nitrite photometer. Damsels I'm going to follow the specific directions of each of the products and see where we end up. Any suggestions or see anything I should address?