The system is a bb 14bc that's been running for 5 months. Sps only.(i know I know) Hydra 26 hd lighting. 4 head dosing pump( 2 for 2 part alk and cal and the other two heads do daily water changes that add up to 1.5 gal. A week.) Extra wc here and there also, Smart ato, reef octopus ns80 skimmer, reef keeper controller, dose acropower once a week. Small 6 line and a small clown for fish. Snails and one hermit for cuc. I just bought the eshopps nano cube sump. I want to add the sump for obvious reasons just worried about any negative effects adding a sump/ refugium could cause? It will add about 8 more gal. To the system. Was going to put some Miracle mud and try some cheato, mangroves, add some more rock. I can stick with the small skimmer or I have a coralife 65 I could put in skimmer section, but my nutrients are very low as it is. Any info or suggestions? Here are some phone pics of the setup.