Ulns

[Myka]

Originally Posted by Chase31

Myka just did an no3 test with my Hagen test kit (all I have) and it came up as unreadable so under 5

Well, first thing, what type of corals do you want to keep? Not all corals do well with an ULNS. Maybe LNS is more what you should aim for.

Your PO4 works out to 0.23 ppm. Which is quite high no matter which corals you want to keep. Why don't get a second nitrate reading with a good kit. If you want to do ULNS, then you're going to need quality PO4 and NO3 kits. You already have a good PO4 kit (make sure you rinse the tubes very, very well and measure with the tube facing the same direction every time). A tank doesn't usually have really low nitrate and high phosphate, but it does happen. The Salifert nitrate kit is good.

Do you vacuum your sand bed? How old is the sand bed? Was it new sand or used sand when you put it in?