Searching for a good ro system...

The Coralife Pure-Flo II is decent for basic needs, but I’ve read a few people mention slow output over time. Might depend on your water pressure — do you have a booster pump?
 
I have used a poretable RO/DI system for years for my Altums. I sild te anels and just sold my second unit which was a 4 stage 75 gpd. Here is the site where I shopped for it and its predecessor a 3 stage RO/DI here https://store.afwfilters.com/ Click on Categories and then on Reverse Osmosis Systems. I got mine under the portable heading.
 
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