Quote:
Originally Posted by martinmcnally
I have my tank plumbed directly in to the RO/DI so its just a solenoid that turns on or off been running like that for around 5 years or so.
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Quote:
Originally Posted by lastlight
And I bravely topoff from a 90g tank. Think this is my 5th osmolator and no problems.
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You two are effing crazy. Don't come crying here when your tanks crash from "sudden low salinity".

My rule is ATO container is no bigger than 10% of the system volume. If the ATO is full, the majority of the tanks' inhabitants will handle it (SPS may not). If I design the system, the sump will also hold this volume with the power off and not get the floor wet.