"Craig Bingman" wrote in message
...
In article ,
Reef Man wrote:


You won't necessarily be able to resolve a hair algae problem by
only working on calcium and alkalinity numbers. Adequate calcium
and alkalinity is a prerequisite for good coralline algae growth
in a system,...............


that is true to a degree, but having higher levels of Alk and Ca help to
precipitate out PO4 and there by reduce the chances of nuisance algae's
using them as a food source.


kc