the full cleaning has only been done twice. Once when half my fish were dying off due to a parasite infestation, and now. My test kit that I use is dtrips, and the readings are as follows:nitrate 0, nitrite 0,water soft,alkalinity moderate-ideal, ph 7.8. I usually do a 25% water change once a month, and that works for me. But with the total cleaning I am going to wait a while. The fish themselves are fine, but the water is reeally a problem.Oh and my light is the regular flourescent that comes with the tank.