Is There Something Such As Too Much Calcium Or Too Much Cuttlebone?

[andy36yr19]

I need to buffer my aquarium calcium so I'm going to use a cuttlebone and I don't know if there's anything bad with too much calcium. I'm using about a sixth of a cuttlebone on a nano 3.5g tank for a betta, 3 shrimp, and 2 nerites. My current ph is 6.6 and I'm also going to use some crushed coral for that.

 

[FishGuest5123]

Won’t the crushed coral do the job on its own? I’m no expert on buffering water but I do leave cuttlebone in my tank and also place 1/4 a Tums in tank each Friday. I also feed calcium enriched food to shrimp and snails. No problems so far with OD in calcium.