water changes he will have, i have a pool pump i just need to fit hoses onto it. Which brings me to my next question, what is the best method to add water conditioner with water coming from sink from a pump? add to 30 % in tank, or add to tank afterwards?it will not hurt. important to keep in mind that it is a preventative and not a cure. its made be used in conjunction with Medifix. your best coarse of action is water changes. until the tank cycles up, these will need to be every other day, at least 70 percent. IMHO.