About 13 days ago I set up a 75 gallon SW tank with a corner overflow, a Eshopps refugium sump and a Eco Tech Vectra S1 return pump. I put water into the sump, about 1/2 full and maybe 20 gallons into the tank. Into the refugium section of the sump I put Brightwell Xport Bio brick, 32 oz. of Brightwell Microbacter 7 and about 20 Marine Pure cubes. To the tank I added 3 20# bags of CaribSea live sand. I let it all sit for 24 hours then added the rest of the water, Reef Crystals @ 1.026 s.g. About 3 days later I added a 1.5" tomato clown and tested for ammonia because I thought I could smell it, It tested 0. I also tested Nitrite and Nitrate, both read 0. Sunday, yesterday, I ran all these tests again and again everything was 0 except for a slight "blush" in nitrate, not even 2. I don't know what to think, either the tests are not working or the Bio Brick, Marine Pure and live sand ARE really working. The only other possibility is that it hasn't even started to cycle yet. Either way, I've transferred a high percentage of live rock and live stock from another 75 gallon that is still setup, not for long, where I used to live. Any thoughts on adding more bacteria Vibrance, Dr. Tim's or Microbacter Clean at some point, not diatoms, dynos or cyano anywhere as yet.