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Antman
07/11/2017, 10:14 AM
Hi I have a 4 stage 75GPD brs RI/DI unit
It is about 2 years old I change out my carbon block Sedimen and DI Resin about every 6 months
My 57G mixed reef has high silica
I do Not have a flush kit on the Membrane
I would like all new filters and someting to help lower silica
Should I replace the Membrane as well at 2 years ?

What would you recomend I use Thanks

SpectraPure
07/11/2017, 12:37 PM
You have probably gone way too long before changing the DI filter. Changing the DI should have no relation to changing the pre-filters.

When a DI filter becomes exhausted, it will leach out the pollutants that it has trapped and SIlica will be the first to go.

You really need a TDS monitor to monitor the performance of the membrane and to be sure the DI is still putting out zero TDS.

You will need to do multiple 50% water changes when you get the new filters:

SF-MT-0.5-10 Sediment
CF-0.5-10 Carbon
MEM-SP-0090 Membrane
DI-SB-10HC SilicaBuster DI

and 3-point TDS Meter to monitor pre and post membrane and post DI:
MTR-TDS-TRM1-4

All can be found on our website, www.spectrapure.com

Support at SpectraPure

Antman
07/11/2017, 12:55 PM
Thanks
My silica is 2.1 in than and I run GFO
also had Molybdenum in tank ..
the DI I change about every 6 months and I used the color changing Resin
Is there a chance I only need a Membrane flush ?

SpectraPure
07/11/2017, 01:03 PM
Flushing the membrane only involves bypassing the flow restrictor so you get a good blast of water to liberate hardness remaining on the membrane. Flushing will not rejuvenate a plugged-up or old membrane.

If you'd like, remove the flow restrictor and run the water down the drain for a couple of minutes. That's all Flushing does.

Color changing resins are never as accurate as a meter.