can't maintain alkalinity

[Jason McK]

Originally Posted by Reefer Rob

Jason, you mentioned adding Boraxo, I've never heard of that. Is that for boron? Won't that throw you KH readings off?

Borate, and sort of. But the addition of Borate will help in maintaining the PH stability. Straight Baking Soda tends to allow the carbonates to become exhausted leaving a carbonate starved water causing a drop in PH and then and increased in carbonate demand. The addition of Boraxo will increase the stability and make the effects longer lasting

BTW the actual mix is A&H 4 Boraxo 1

J