WELL, I deserve a big kick in the grion for overlooking this...I'm pretty sure I know why we didn't have a hatch...NITRITE. GD NITRITE. I'm pretty PO'd at myself for overlooking this.
So, I was thinking about our first 2 hatches vs. the third...obviously we'd made some strides. The BIG thing I did prior to spawn #3 was a FULL water change that was replaced with 50% of the water in the parents tank, strainted through 10 micron, and 50% water from our Percula tank, also strained through the 10 micron. Water quailty in our reefs tends to be really GOOD...I feel I've been a bit to arrogant and ignored common sense in this fourth batch. Quite possibly why we lost the last of our 3rd batch too...man I feel like a schmuck right about now.
Well, I guess tomorrow I get to strip the tank down, wipe it out, and restart, but maybe I'll dose with some Stability first, get that sponge filter better established. The watery quality in the larval tank was ph 8.1, Alkalinity 3.5 meq/L, Nitrite around 5.0 PPM (stupid stupid stupid!). The ammonia tests are still sitting, but it looks like ammonia isn't really a problem.
@#$%Q@#%#@Q$%@QWETAT!!!!!
Guess I'll be doing DAILY 20% water changes from now on, unless anyone has a better plan.
MP