I just purchased a DOS and set it up tonight to do automatic water changes. It's pretty slick. I'm doing about 10 gallons a week so not a huge amount.
Looking at the interval summary, it says the pump will be dosing 6000 ml/day at 25 ml/minute. That means 4 hours per day or 120 hours per month. I watched a video that said the heads have a 600 hour life which means 5 months at the rate I'm using them?!
That seems like an impossibly short life. Am I calculating this correctly?
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