ok, I was unaware that heat alone was effective. I do have a heater. My water params this morning were ammonia:0, nitrites:0, nitrates:10-15, pH:7.2. Is 88*F a safe temperature for cories and bamboo shrimp also? (its a 10 gal with 1 betta, 3 otos, 3 cories, and a bamboo shrimp)