I’ve had a my tank set up for about 3 months now and it’s had ups and downs but was finally stable with soft corals 2 tiny hermits and a blenny. I wanted to add a 10gal sump with a live sand bed and baffles and after everything was built the soft corals started closing up and staying closed all day, the water was cloudy and now the nitrate levels are starting to rise to 20-40ppm. I moved the heater and main bio-wheel filter down into the sump and the flow did drop some but with the return and flow pump it’s still moving decently.