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Discussion Starter · #1 ·
Both are made by SeaChem, and all the descriptions I have seen about the product basically says the same thing about both products. But onyx is more expensive?

Whats the deal?
 

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Discussion Starter · #2 ·
ok maybe I answered my own question. From SeaChems website the only differance I can see is that Onyx has a slight hardening effect(+.1-.5 pH) on the water where flourite does not. Is this the only differance?

Also if this is the case why would you recommend using Onyx over Flourite?
 
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