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#1
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![]() Sorry my fingers were typing but my brain was asleep lol.
In most cases, no you will not have 0 phos on the outlet. So a better indication would be when the outlet is at the same phosphate level as the overall po4 level of the system. |
#2
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![]() I change mine every 4-5 weeks
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250G DD LED SPS R.I.P. 180G LED SPS 80"x36". 300G custom build Owner of Mountain Ridge Heating and Gas Class A gas fitter, HVAC |