had a decent sized coral/frag RTN over night. Fragged about 1/2" of live coral off of the tip, we will see how it does, but I am honestly not expecting it to survive (but also not ready to give up on it yet). It was one of our favorites too, but such is the way these things go. This is the 3rd coral to RTN in the past month or so, but one was a new frag that was less than a week in our tank, so I attribute that one to succumbing to the stresses of acclimating to our tank (transportation, dips, acclimation, etc).
What with all going on I decided to do the full suite of tests on our water (I admittedly usually only do this every month or three). Here are the parms I came up with, and the test kit I used to cehck them with) :
Alk........... 9.5 (Elos)
Ca........... 400 - 425 (Elos)
NO3......... 5 (Elos)
PO4......... .19 (Hanna)
The Phosphates bothered me, while I don't necessarily attribute the deaths to it, I still knew that I needed to take care of it. We had been dosing sugar for a couple of weeks now, but it was few and far between and far from scientific or controlled (just a half teaspoon or so twice a week, give or take). I decided that we needed to take that up a notch and started today with 2.5 tsp. The two main downsides that I can see to dosing is 1. O2 depravation and 2. Stripping the water too far too fast. There is little to the nitrates to strip, and the PO4 is not abhorrently high, so that takes care of concern #2, and concern #1 should be well handled by our skimmer. That plus I dosed about 10% less than the lowest recommeded first dosage (and had been dosing smaller amounts for a couple of weeks now already). I will continue to report how it works out for us
On a water quality/clarity note, I am still troubled by the "cloudy" water that we seem to be stuck with. I have more or less ruled out micro bubbles, but while doing some work on the main pump earlier this week I had the return offline for about an hour, and during the time the tank seemed to clear up a bit, but that could still be caused by sand being stirred up. I am starting to lean towards the sand that we picked up from a fellow reefers tank when he took it down. We wanted it to help spur on our tank cycle (since we started with 100% base rock), but now I am starting to regret that decision since I think that this sand is just too fine for a reef tank. The tank where it came from was a mainly softies tank, so I don't think that he had much water movement in it, unlike our tank now. I still am not sure what I can do to prove this, beyond shutting ALL pumps off in the tank for a couple of hours (not an option). And if I do prove that it is the sand, then what do I do to "fix" it ? *sigh*.