I haven't tested my tank in a while as everything seemingly was going well. Some brownish algae showed up on the sand, and it seems to go away at night. My thought was Dino's so I tested the display. Nitrates came back as 5.2.. However, phosphate.
Came back as 171ppb on the Phosphorus ULR tester, and .59 on the H736 tester.
Tested my saltwater vat, at .33.. I'm using the Red Sea salt, blue bucket.
Using the H713 which "says" it works in freshwater, I get .04. Testing error range is -/+ .04 on that tester. Not sure if I can even consider that useful.
RO/DI filters changed in Jan. The DOW membrane is going on 3 1/2 years old, that wasn't changed because the end was cracked when I got it. BRS replaced it, I just never installed it.
Ruling out the RO/DI, I would assume it's the salt, or the vat it sits in. Not really even sure where to start?
Came back as 171ppb on the Phosphorus ULR tester, and .59 on the H736 tester.
Tested my saltwater vat, at .33.. I'm using the Red Sea salt, blue bucket.
Using the H713 which "says" it works in freshwater, I get .04. Testing error range is -/+ .04 on that tester. Not sure if I can even consider that useful.
RO/DI filters changed in Jan. The DOW membrane is going on 3 1/2 years old, that wasn't changed because the end was cracked when I got it. BRS replaced it, I just never installed it.
Ruling out the RO/DI, I would assume it's the salt, or the vat it sits in. Not really even sure where to start?