I've been using Fritz blue box for 7 months on a brand new 100gal tank. After the 7 months i started using Fritz red box as my 100gal is almost full of coral and have about 20 fish. I have had 0 issues with Fritz and actually really love their salt mix. I clean my ro/di and saltwater reservoir weekly. I'd just wait on your icp tests to come in. Hang tight reefer! Things will get better just stay on top of it and be positive despite your losses.