DkH

[sphelps]

Originally Posted by whatcaneyedo

I didnt experiance an alkalinity burn on an acropora until my alkalinity shot up to +20dkh due to having too much flow through a calcium reactor. The flesh just pealed off the acro almost instantly. I havent lost anything like that while keeping my alkalinity in the 11dkh range.

Every tank is different, but have you tried a lower dkh? I rarely hear of anyone having good results at that level. What kind of salt do you use?

[whatcaneyedo]

Originally Posted by sphelps

Every tank is different, but have you tried a lower dkh? I rarely hear of anyone having good results at that level. What kind of salt do you use?

I have a problem with low pH. If I let my alkalinity fall to ~8dkh my pH falls to around 7.6 at which point my controller shuts off my calcium reactor and sounds an alarm. So I have to keep my alkalinity in the high acceptable range for the sake of my pH.

However, if it wasnt for my pH problem I would aim to keep my alkalinity in the ~8dkh range as it seems to be more natural based on what I've read.

I use both Seachem Reef Salt and Instant Ocean. 50/50

I agree with you, every tank is different. Thats sort of why I posted in this thread in the first place. The question of 'which DKH is best for growth' seems kind of silly to me because everyone will have their own reasons and experiences that make their preference different. But rather than flat out saying that I thought I'd just state my side and let the questioner figure it out on their own. Obviously a dkh of 8 for me wouldnt be very good if it meant my pH would be 7.6

[Aquattro]

I think it's safe to say that as long as you're in a range, you're fine. Same as Ca. Anywhere between 360 and 450 will be fine.
Alk between 7 and 11 is where I aim, and as long as you don't fall too low, you should get good results in coral growth.