Id trust a topoff over a doser set to some arbitrary number. How do you know how much water will evaporate while your gone. I would think that moisture levels in your house would be different while you are gone as no one is opening and closing doors letting in fresh air. This could affect your evap rate.
Get yourself a good ato and enjoy your vacation.
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I don’t trust ATOs regardless of brand. Every horror story involving a reef tank is related to dosing pump failure or ATO failure.
It’s pretty easy to measure evap. Wait 3 days, take note of how much water evaporates, add that much or less than that much back to the tank. I don’t have a door with direct access to outside, I live in an apartment. Humidity levels stay near constant. Change in evaporation won’t be much of an issue.
From the point I fill my tank to the point the tank would overflow is almost 5 gallons. The entire volume of the container will be under 5 gallons. The idea is to reduce the swing in salinity over the course of 10 days. Not keep the tank at an exact water level. My question isn’t should I get an ATO. My question is, what’s considered overworking a peristaltic dosing Pump. Is 3 gallons pumped over the course of 10 days overdoing it?
