Two Part Solution Problem- Help!

[reefwars]

Originally Posted by straightrazorguy

I didn't change the amount dosed. I watched the alk climb steadily over a week. After being steady for a month or so, between Nov 1 and Nov 8 it went from the 7.6 - 8.2 range to 9.0 - 9.6 range. That is significant. I was still dosing the same amounts of Ca, Alk and Kalk automated via my Reefkeeper. That's what is so puzzling...

So, clearly the tank inhabitants stopped using that much. Why?

Maybe not solely but when stuff doesn't go right they shut down consumption , don't put pinpoint faith in your tests or your kalk either . I'm not sure why the corals would stop using it in your system the reasons are literally endless but it happens.

[straightrazorguy]

Thank you guys for all your thoughts. I am now running the tank with Kalk and CaCl2 solution additions only. The Alk dosing pump is still unplugged. The Ca levels are good (400-420) and the Alk is somewhat stable too (8.6-9 dKH).

Yesterday I checked nitrates and phosphates too and they were both zero. I did notice that other acro colonies are STNing from the base up. I just wish I knew what is causing this. Watching colonies STN helplessly is painful....

[dcw1sfu]

If running biopellets you may need to have ur alk in the 7-8 range. Many people that run biopellets report STN with alk levels above 8

[straightrazorguy]

Quick update: I finally broke down and took the kalk stirrer online. The Alk solution part of the two-part was offline for a coupl of days before that. The alkalinity took a couple of days to fall to today's range of 7.6-8.2. Which leads me to think my corals have shut down. What puzzles me is that I am now only adding Ca solution (part one of the two-part) at the same rate as before the STN started, and I can barely keep the Ca above 400.

I noticed STN startingin in a couple of other acros, including my green slimer. This is truly tragic....

[reefwars]

if you cut out the kalk but kept chloride the same as before the stn then your dosing less calcium as the kalk had calcium in it too so the chloride dose would need to be more to be the equivalent of both.

small differences in calcium are hard to control and test for ....it takes 1-2 weeks just to get an accurate consumption rate as the differences daily are to small.

sucks man every sps guys future and nightmare

[gregzz4]

Originally Posted by straightrazorguy

Quick update: I finally broke down and took the kalk stirrer ...

I gather you meant to type 'offline'

Sorry to hear about your losses Catalin

Keep the Kalk stuff in case you ever need to remove the 2-part for some reason, but ya, you should have removed the Kalk from the equation when you started 2-part ...

BTW, I've just this week stopped using DowFlake Xtra
I suspect issues from it and have switched to J&L's Schlobster Calcium Chloride

I now have about 40lbs of ice melter on hand

[straightrazorguy]

Originally Posted by gregzz4

I gather you meant to type 'offline'

Yes, Greg, I meant "offline". I still use Dow Flake CaCl2. What kind of issue do you suspect?

[mseepman]

I didn't see you mention what type of salt you are using...have you recently opened a new bucket? There can be other extenuating factors...not saying just salt but its something to consider.

[gregzz4]

Originally Posted by straightrazorguy

What kind of issue do you suspect?

There's a chance it's causing my GHA issues
My problems started less than a couple months after I started using the Dow and I haven't been able to get it in check since (6 freakin' months )