I understand low po4 is elementary however I use salifert kits and it registered a minute trace of po4. . NOt sure if it even play a significant role with such low level ,I could be wrong. I do employ Phosban just to be safe.At this point I highly doubt it's the LPS since I dont have that many to begin with. I do not have DI canisters. My pocket tds meter display a reading of 2.5-6.
Hey wackie1wackie,
I know it sucks sometimes when you can't get things to go right, but that's part of this hoby.. Trust me, once you figure it out.. you're going to feel great about it.. Then, you will be in position to help someone else..
A couple of things that i would look at:
1. Do you have any rusting metal in system (on interal pumps, or other submersable devices? Even a small amount can affect your SPS.
2. Check the amount of phosban your using.. You may be using too much, which can cause STN from the base.. This happened to me with my first tank.. I discontinued use and grew chaeto in my sump on a reverse photo period to help deal with phosphate.. that worked great for me and STN from the base stopped. Don't get me wrong.. Phosban and Rowaphos are great GFO products, but they have to be used properly and at the right amounts... Currently, I carbon dose to control nutrients and only run phosban perodically on my system after siphoning my sandbed once a month.
3. Has copper ever been used in your aquarium, prior to going to coral.. You stated that you have been in the Saltwater hobby for about quite some years now. This could be amajor factor, because Copper embeds itself into the silicone seals of a tank.. For this reason, a tank that has been treated with copper should never be used for a reef.. You may know this already, but I'm just trying to throw evrything that I can think of out there in order to help you find the cause.
Good luck and stick with it. You can beat this!