Affiliate disclosure
Coral Compass is a free reef aquarium resource. To keep it free, some links to products on this site are, or may become, affiliate links. If you click one and buy something, we may earn a small commission from the retailer at no extra cost to you.
In line with the U.S. Federal Trade Commission's Endorsement Guides (16 CFR Part 255), we disclose this relationship on every page that contains product recommendations, near the recommendations themselves.
- Commissions never change our recommendations. We recommend products based on accuracy, reliability, value and reef-hobby consensus.
- We aren't paid to write about any product, and no manufacturer reviews our content before it's published.
- Where we participate in the Amazon Services LLC Associates Program, the following applies: As an Amazon Associate we earn from qualifying purchases.
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Our reef chemistry targets and dosing math are educational. Always test, dose slowly and retest.
Last updated 2026-10-15.