Reef nutrition

RODI - Low TDS Source, Lower Flow Restrictor to Save Water

I saw on a BRS video that you could use a lower flow restrictor (say 300ml/min or 400ml/min) if your water source TDS is under 100. Mine is between 30 and 40 in Alameda. The flow restrictor that came with my 6 Stage 75 GPD Deluxe Plus RO/DI System is 550 ml/min. Anyone know what's a good flow restrictor ml/min to use for 30-40 TDS? I asked BRS just now but it looks like they are out of the office already. I'll post if I get an answer. Posting this also to help people who may be in the same situation.
 
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