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Written by people who keep them

Care Guides

Six guides, no mysticism. Water chemistry, light, flow, feeding, coral warfare and the pests you will actually meet. Every number here is one we run in our own systems.

02

Flow: The Parameter Nobody Tests

You can test alkalinity to two decimals and still lose corals to a dead spot you never noticed. Flow moves food in, moves waste out, and stops detritus from settling on t...

2 min read Read the guide
03

Light and PAR, Explained

There is more mysticism about reef lighting than about anything else in this hobby. It is simpler than it sounds: PAR is how much usable light reaches a spot, and every c...

3 min read Read the guide
04

Feeding LPS

An LPS tank that gets fed grows at two or three times the speed of one that does not. Feeding is also the fastest way to foul a tank, so the technique matters as much as...

2 min read Read the guide
06

Water Parameters for Beginners

Corals do not die from a bad number. They die from a number that moves. Everything below is written around that one idea. The numbers that matter ParameterTargetHow often...

2 min read Read the guide