Biotopes
New member
Just use a water pump attached to several feet of hose with pinholes throughout it, and when the pump turns on it will spray an extremely small "jet" (more like mist, which is why it works) of water. Then you could add something small to the end of each pinhole that the mist would collect on, and eventually the weight of the water would pull a drop down into the tank. If you have enough water going through the "mister" you can create a steady rainfall using this method. I'd go for 3-4 drops per second, and use as much or as little hose as you need to adjust the amount of rain.
You could set that up on a timer to rain, for instance, a gallon per day (assuming you need a gallon RO/DI top off each day. Just modify for how much water evaporates, and then run the pump to see how long it takes to add a certain amount. Finally, just run the timer that long
) and instead of using an ATS you could just rain the topoff
Being that you probably have a few pumps lying around, you could grab one of those to do this with!
You could set that up on a timer to rain, for instance, a gallon per day (assuming you need a gallon RO/DI top off each day. Just modify for how much water evaporates, and then run the pump to see how long it takes to add a certain amount. Finally, just run the timer that long
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