What’s the highest KH a reef tank can handle before it crashes?

[leonardomanzano]

Red Sea recommends a KH of 12 for great coral growth, I will try to aim for this KH level but I’m worried that at that level it’ll be teetering with a crash.

 

[blaxsun]

I like to keep my alkalinity around 8.25-8.35 dKH (±0.15 dKH), and I know many coral places also keep their alkalinity in the mid 8's. I've used Red Sea's Coral Pro Salt which has a very high alkalinity. While I didn't burn my reef out and I don't think I suffered any ill effects, all of my corals were mostly frags at the time and it was a relatively new system. Some people absolutely love Red Sea Coral Pro Salt (Black Bucket) so there must obviously be a market/demand for it.

I did switch to Tropic Marin when I upgraded to my larger system just under 2 years ago and haven't looked back.

 

[gbroadbridge]

I ignore anything red sea recipes recommend.

I don't know what crystal ball they use to generate them, but it's obviously been dropped a few times.

I keep my Alk at 7.7 and growth is just fine. Stability is the key.