Help: SPS bleaching and STN

[Myka]

Originally Posted by ChizerBunoi

Well I feel really silly. [...] All colonies were pulled and mounted on travertine tiles. I haven't found any AEFW at all, nor any eggs. I must have confused and misidentified it with rotifiers or copepods? I saw two creatures jump out of the coral when it was in an iodine dip and die. Can flat worms run around really fast? yah!!!!!!

AEFW are pretty big (like average 1/2" or so), other flatworms can be much smaller. All flatworms move pretty fast, but not like pods or rots.

I believe the issue was not due to water quality but actually due to low alkalinity. I replaced the regent and it was way off. I'm hoping to run my ALK much higher now at about 9dKH to ensure I don't have these issues anymore. I'm assuming with the ALK at 6.2 dKH, the tips got burnt and the STN started.

What are you using to test alkalinity? Maybe you said it already...I will go look through your thread again.

EDIT: Ah, Hanna Checker. You experienced a big difference with new reagents? That's not comforting. Do you know anyone with an Elos kit within expiry that could double check for you? Salifert reads about 1 dKH high.