STN due to low PH?

[StarF]

i was thinking the same about metal, so i removed a little hose clip, and changed 500L of water, witch is about 35% of the water volume, this dident help anything.

i have done a search for AEFW and found nothing.

I had a termometer breake in the system a year ago, and it some of the small metal balls in have in the end. Dont know if that have anything to do with it? how ever they will be impossible to find.

 

[Los]

I sincerely hope you get the problem solved. Twice now, I've had my sps slowly die from the bottom up. The first time that happened, and after much research, I finally solved the problem by adding GFO (to reduce phosphates). Recently I started to notice the same problem, with half a dozen colonies dying from the bottom up. It's a slow process, with maybe 1-2 mm/day of tissue dying. It followed several months of not having changed my GFO reactor and a week after I disconnected it entirely. I didn't think the problem was phosphate, since I was getting 0.00 readings on the low-range Hanna Phosphate test kit (which is brand new, incidentally). In fact, I was thinking that my phosphate was too low and that's why I disconnected the GFO reactor. Since the problem mirrored exactly what had happened before, I put a fresh batch of GFO in the reactor and reconnected it. Within 24 hours I noticed a remarkable recovery. The tissue necrosis stopped entirely, the color of my corals started to recover, and I've seen more growth in the past week than I've seen in a couple of months.

There are obviously lots of problems which can cause sps to slowly die. I would recommend giving GFO a chance, even if your phosphates read low, since it sounds like you are running out of options.

Good luck!

 

[StarF]

hi tnx for your reply.

i think things are moving in the right direction, finaly.

how ever i still have a ph isue, in the night its get as low as 7.5 and in the day it only reaches 7.8.

i need to know if this will be a problem for my corals? do i need to manualy boost it 4 times a day? or should i just leave it, and see if it will corect it self over time?

 

[Los]

Have you tried borrowing someone else's pH meter to double check that measurement? I can't comment on whether it's a problem or not, but I would worry that pH that low is indicating an underlying problem. Opening the windows and dripping kalk (both already mentioned I see) would be where I would start. Maybe one of the more experienced folks can answer your question.

 

[StarF]

yes tryed measuring it with other meeters, and still get the same results. what i have done so far, is manualy mixing kalk wasser, in a bottle and use that. But if it something that isent gonna directly harm my corals, i would rater just let it get into balance by it self.

also i was using the ph meter from my calcium reactor, to see when i had to add limewater, so i couldent run my calcium rector at the same time.

 

[luther1200]

I don't know if any body mentioned it but I believe a high level of organic waste will lower pH.

What kind of bio-load do you have, and what is your feeding routine?

 

[StarF]

i got:

20 anthias
2 yellow tang
3 Paracanthurus hepatus
1 sohal
1 Acanthurus lineatus
4 wrasses
4 frimandi
2 mandarin
1 Chelmon rostratus

i feed 2 times a day. If it was due to high bioload, wouldent no3 rise? its dropping?

wouldent there be more no2?

also just cleaned out my sump today, and ran a magnet over the bottom, found loads of small metal balls, dont know there they came from, hopefuly i got em all, couldt explain why many of my corals were getting a green tan, could this also be the cause of my ph problem? will a ph of 7.5 in the night harm my corals? i changed 10% of my water around 100L