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Looks Like Diatoms are showing up now. And also the red light at night really works to see whats living inside the LR I was like wow. Also the guy that came over and looked at my tank here are a few things he did.
1st thing he did was completely take off the glass covers.
2nd said my sump was little on the fast side and I will need to get a valve on the return pump.
3rd said my lights will need to be changed ever 6 months.
4th re-pointed my power heads.
5th told me to make my middle a refugium.
6th Told me I should change from Instant Ocean Salt Mix
My LFS told me I should get
15 crabs
10 snails
and wait awhile on the shrimp.
I think I will start getting my stuff by Wed I hope
i had the exact same problem with my tests. I was getting a reading of 160 ppm and it confused me too. What test kit are you using?