No problem, I only use Sponge Power and Coral Booster now. My skimmer is way too oversized for my tank now so I dose at night when the skimmer goes off. I only run the skimmer until 9pm, it has been stripping the water of too many nutrients and my system is super clean. I was about to do a water change last week and when I tested I had nitrates at (1) and phosphates at 0.02 and that is feeding very heavy once per day. Hope that helps.