How Often to Change Water in a Reef Tank (Schedule)

Water changes are one of the most practical maintenance tasks in a reef aquarium: they dilute dissolved waste, refresh trace elements, and help stabilize key water parameters. But the right frequency depends on how much “work” your tank is doing—how heavily it’s stocked, how strong the filtration is, and what your test results show.

Below is a proven, step-by-step schedule you can follow in most reef setups, with guidance on when to speed up or slow down.

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Me & Velvet Sickness on the Reef: Safe Treatments

Me & Velvet Sickness on the Reef: Safe Treatments White spots, mucus coating, rapid weight loss: When Ich or Velvet disease (velvet disease) appear in a reef aquarium, every hour counts. Both diseases are caused by parasites that infest fish – while corals and invertebrates can be affected to varying degrees depending on the treatment. Therefore, it's crucial not only to know "what helps," but also "what is demonstrably safest for the reef." The following overview categorizes the typical symptoms, explai ... Read more »

Frag Tank Setup Guide for Coral Propagation

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