We recommend that you continue with your normal water change routine until your water is clear and your tank is algae free. Make sure that you dose Nualgi after your water change. Once your tank is looking good and algae free, you can experiment with less frequent water changes. Trialists have been able to gradually delay water changes from once per week to once per 3 weeks or longer.
Nualgi works on the nutrients buried in the substrate or pores of your rocks. This may initially show up as more algae build up in your tank after the first 1-2 doses. If this happens in your tank then we recommend additional water changes to get rid of some of the nutrients being purged by Nualgi.