My tank is one year old today!!!!
Before giving an actual update on my system and talk about the past year, i think i'll share the past few months... because believe it or not... i though i was crashing my tank, actually i would have killed all SPS if i continued what i was doing ... and all that because of me... Now that everything is coming back to normal, i feel better talking about it. But believe me i was not sleeping some nights.
If you went throught all the pictures and updates, you know that around chrismass time i decided to sell many of the birdnest, montipora, digitata and many other LPS and more common SPS. In January i sold all these corals, of course i was expecting a significant decrease in Alk and Ca consumption, so i tested daily and adjusted Alk-Ca dosage to keep as stable as i could.
Then later in Feb-march (i don't remember) i sold a bunch of other SPS that i wanted to replace by other vairety or better looking corals. Again, i tested daily for a certain period.
I typically maintain my Alk at 8,3 +/- 0,2. I do 5gal WC weekly, or 3 WC per 4 weeks on my system... i skip one once in a while. I condider to have a pretty solid routine for cleaning, dosing, stable parameters, etc.
In parallel to that, i wanted to increase my fish stock, starting by a pair of chalk bass late Januray. Did the TTM. Then a Labouti wrasse Late March, did the TTM. Then 6 Vanderbuilt chromis right after the Labouti. Don't worry about N and P, my nutrient export in robust... the issue is somewhere else...
So Early Jan i sell a bunch of SPS, then started the QT of my chalk bass with TTM, i usually use tank water from WC for the QT. I completed the first batch of fish, no issue. My alk is a little higher than usual, nothing crazy, but the trend is there, i'm around 8.6 and 9 during the last week of QT (testing daily). I remember having cut the Alk dosing by Half at some point, and alk was not decreasing. At that time, i was jsut cautious,though the raise was due to the SPS i sold in early Jan (football size Birst nest colony and others).
I was keeping my 5g WC weekly, Alk was pretty stable at 8.7.
Then late march i got my labouti wrasse (not long after i sold another bunch of SPS), TTM again then 1 more week QT (3 total) because my chromis were arriving. During my Labouti wrasse QT, i could see alk raising again and hitting 9.6-10.0, but i had just sold another bunch of SPS, thought it was still me dosing to much vs system consumption. i also started to see the first signs on some of my corals (center of colony losing color, not RTN, jsut white). I started to be really worried, i investigated a lot of stuff: dosing pump calibration, overdosing some product, contamiantion, Lights, GFO,... carbon... related or not i looked at a lot of potential root cause. I attributed the loss of color to low nutrient in a higher alk water. I had to recude alk or increase the nutrient while i find the cause of the Alk instability. I reduced photoperiod on cheato, reduce amount of cheato in refugium, removed GFO ( i was just running little amount), target feed coral more ( i was already doing 4 time/week).
Then i start the QT of my chromis, with TTM... My alk hit 11 dkh...... I was freaking out.... i jsut received a bunch of realy nice coral and something was ongoing that i did not understand...
UNTIL... i talked about a certain line of product for reef tank with a rep, we talked about baling, additive, salt, etc. We compared salt... most brand were listed... then i see mine..... Coral Pro salt... alk = 12............... WOW GENIUS!!! forgot that detail... when my system was doing well, i was only doing weekly WC and with my dosing it was pretty much balanced and i could maintain alk at 8.3 (even with a 5gal of water for WC at 12 dkh). But with several WC due to TTM + the few WC i had to do to siphon my sand... i ended up raising my Alk just by doing WC... i felt so stupid... i stopped doing WC for a while, then change salt for a brand that had a dkh around 7.5 then slowly reduce alk to that level. It has been more than a month now since i realized my mistake and stabilized my parameters again and i can see the color coming back and new growth with bright colors.
i had no loss of coral, but lost most of the 'pop' on certain coral and some colonies also got their base pretty bleached out. Growth seemed to be on hold from Feb-March to April. Only one colony RTN, but i was able to cut all branches and save most of it.. i was lucky, i still have what i consider a nice mini colony.. it was a random acro, no name.
Looking back at it, it seems so obvious that WC was the cause, but because the change happened on pretty long period and with many changes at the same time, I was unable to see that earlier.... i was more leaning toward the imbalance i created when i sold most of the big colonies.
No sure i'm the best story teller, but i tried to explain how i felt during this 'investigation'... ;Pompus
I think it's important to share the good and bads so we can learn...
I'll make an actual update of my build in the next post!!
