Still getting 1-2 TDS after DI

[Tuan’s Reef]

so I just change the filters to my Aqua Fx Barracuda.

It’s a 4 stage unit. Been getting 0 tds but today I was getting 0-1 TDS after DI. DI looked exhausted so I change them all out. Sediment, carbon, and DI resin all changed

Only the RO membrane is not changed.

After flushing and running it for 5-10 minutes I am getting 2 tds and sometimes even 3 after DI. It has dual tds meters with pressure gauge . Getting 63 psi so I’m good there. Reading before DI is 7-8 ... but after DI is still 2.

Is it my RO membrane? I just ordered a new membrane , but it won’t be until here till middle of the week or so.

Just mixed enough for Sunday’s weekly WC and ato reservoir has enough to hold me.

 

[Tuan’s Reef]

Took apart the DI Resin chamber and didn’t see anything amiss. Put it back together and flushed it again. Kept it running for another 10 minutes and now I’m getting 0 tds. Guess it needed some flushing and run time on this set . My other set was good to go in 5 minutes