The Minioxydator I have in all three shrimp pools. In the summer, when temperatures rise, it gives me the certainty that the basin be supplied despite elevated temperature with sufficient oxygen. Even on hot days I barely had failures. Nevertheless, one should always strive to cooling. I'm for. As more water change or put on a fan. Nevertheless, it may happen that one is a few days so clamped that you can not be great to take care of the pool. The oxidizer is, however, always in my pool (temperature independent). The Wasserstoßperoxid do I reorder in 1 liter canisters. A filling (with a Oxydatorstein) stops here for about 2 - 3 weeks.