This may be a silly question, but during the cycling process, using Tetra Safe Start Plus, I know you are not supposed to do water changes for 14 days after adding it. I have a 40 gallon I am trying to cycle and I need to add water to keep my Fluval canister filter output submerged. Should I add distilled water to keep it topped off? Or should I add tap water? If I add tap water, is it OK to use a conditioner (not Prime, as i know it can interfere with the beneficial bacteria in the TSS,+)?