reverse osmosis tubing

Hello everyone so I am soon going to purchase an RODI system for underneath my bathroom sink and before I get it I want to know where I should drill the hole for the drain line on the filter. I know putting it straight into the sink is an option but I’d rather have it look tidier. Some people...

I’m setting up my new tank with a fish room on the same level but separated by a wall. The best solution I could come up with for ATO was to run RO tubing up the wall, above the ceiling, down the tank wall, and into the sump. The Neptune ATK pump seemed powerful enough and it is! My problem is...