About

Reef Directory exists because most reef keeping advice online is either a product recommendation or forum mythology passed down through threads started in 2009. We cover the parameters, biology, and decisions that actually determine whether a reef tank thrives — starting from the nitrogen cycle and working up through coral husbandry, equipment selection, and troubleshooting.

We do not sell equipment, accept sponsored posts, or maintain affiliate relationships with livestock vendors. If we recommend a test kit or a dosing method, it is because the accuracy or outcome justifies it, not because someone paid for the mention.