motortrendzSo your arguing a spike causes burnt tips not high alk, by giving an example how u had a spike in your tank that didnt cause burnt tips? Probably the reason you didnt get any burnt tips was because you didnt leave your tank at that high of a level.
From my understanding the reason acros get. Burnt tips is because high alk causes corals to grow faster then they can produce zooxanthellae, causing bleached tips and stressing the corals.
I lowered my alk from 9 down to 7 and within a week saw colors in my acros I've never seen before..it was amazing! Lower all = more color, higher alk = faster growth...the balance between the 2 is up to the reefer. But dkh too high is just gonna do harm.
Said it all