Through several steps of poor planning, I have a 200W Visi-Therm Stealth heater in my 75gal tank (I think it should be at least 250W) and an useless 100W heater in my 20gal tank (set at 84, can barely maintain 77 and is quite erratic). My plan is to upgrade the heater in the 75 gal
tank with a larger Visi-Therm and move the 200W heater to the 20gal tank. My concern is that putting a heater intended for 40-60 gal
tanks would cook the little residents of my 20gal tank.
So, is it safe to uber-heat a 20 gal
tank with the 200W VisiTherm Stealth?