I've been running Modern Reef RKS + Polypop + Coral Food exclusively for 3 weeks now in my Nuvo 20 gallon nano (
build thread here). As another member pointed out, the stability is quite high in terms of parameter fluctuation - which is nice. My consumption is low at only 1.4 ml/day, but my system is mostly SPS and LPS frags. I dose 1 drop a day each of Polypop and Coral Food.
One thing I'm noticing is some red slime algae on the sand bed. The tank is only about 5 months old, but this is the first time I've seen it. The only other thing I am dosing daily other than the Modern Reef RKS system is lab grade Ammonium Bicarbonate solution to keep Nitrates between 5-10. I also dose about 1 ml of MR Biodiversity 2x a week. Here's my params as of now:
My temperature is set to 77 degrees F, with a +or- variation of 0.2 degrees F. SG is stable via ATO at 1.026. My flow is random and strong enough to move some sand on both sides. My SPS par levels are between about 300 - 475, lit by 14k - 20k Reef Breeders Meridian+Edge bar for 11 hours a day including ramps. I do a 4 gallon temp. + salinity matched water change 2x monthly with Red Sea Blue Bucket (moving to MR salt soon). RODI water reads 0 TDS out of a 6 stage unit.
So to my point - my SPS frags are not really coloring up or thriving as I'd hoped, and now I have some red slime algae. I don't know if I am doing anything wrong, or if I need to be more patient. Please feel free to chime in with your thoughts!