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05-05-2006, 09:41 AM
It'll really depend on how much actualy water volume your system consists of, if it's smaller than additional salt may be needed to maintain the SG... for larger systems, say 55-75+ it usually has very little impact, to compensate, during waterchanges on our 270g system, each time I would draw off 33-34g of water from the tank and replace it with 35g new SW. Salinty held dead on at 1.025. The extra gallon of water would evaporate off within 8-12 hours and gently raise the salinity that extra fraction.
My assumption is this is better (easier on the system) than simply replacing the same amount of water with a higher salt content to compensate.
Still do the same with our smaller tanks, with just less quanity.
The best way would be to monitor the SG of your tank over a long period of time and chart it, if the salinity starts dropping off as you near your usual waterchange time and figure from there what the effects is on your specific system.
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