mfinn
Surgeonfish
Do not waste your money on additives just yet. I would say don't buy them at all but I don't want to start a big debate
I keep a clam, zoa's, LPS & in almost 5yrs have NEVER dosed anything aside from 2 part. And I even quit that by upping my water changes.
Our salt mixes have what is needed. But most try and get away from doing regular WC's via dosing. So it's a personal preference. Also it may be the bigger the tank the easier it is to dose instead of doing regular WC's.
FYI-our LFS's are there to make money. It is their job to sell you product. Most of which you'll never need.
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+1
great advice.