Is this safe?

[Cnidoblast]

I was told by my LFS to add more dry rock as my PH was low - The man who owns the shop said to rinse the sun dried rocks off before use - I did and a good amount of algae came off of them - Will I get a life ending ammonia spike from the junk on my rocks or is it a slow decay process? Just to be safe I am running two bags of purigen in my tank alongside a small packet of zeovit

 

[Randy Holmes-Farley Verified Community Expert]

One thing I can say with certainty is more rock is not going to help with a low pH problem. How would it???

Yes, the dead stuff will decay (likely lowering pH ) .

There's not likely to be a problematic ammonia spike in an established tank.

 

[Cnidoblast]

Geuss that mean's ill still need to buffer every week - What will the rock do beside look pretty?

 

[Randy Holmes-Farley Verified Community Expert]

Geuss that mean's ill still need to buffer every week - What will the rock do beside look pretty?

Buffers are not a good way to deal with pH either. Alkalinity generally gets too high.

This has more:

pH And The Reef Aquarium
http://www.reefedition.com/ph-and-the-reef-aquarium/

 

[Larry L]

Buffers are a good way to deal with pH either.

I think Randy meant to say "Buffers are *not* a good way...".

 

[Randy Holmes-Farley Verified Community Expert]

I think Randy meant to say "Buffers are *not* a good way...".

lol yes.