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Old 01/09/2008, 10:17 AM   #3
Capn Jack Sparrow
MarineFishGuy's Avatar
Join Date: Jun 2002
Location: Central Oh-io
Posts: 804
I used to think DI did not do a whole lot until I did some testing with my TDS meter.

Before DI after RO: 35
After DI: 0

I intend to replace my RO membrane once I finish paying off my credit cards from Christmas, but it is in good shape (no visible tears) and is only 6 months old). However my percentage of removal is somewhat low.

However most people consider 35 too high for TDS. Although my final output after DI is 0.

You can get add-on DI cartridges from Buckeye Field Supply. This would be cheap insurance.

You may want to back off on feeding a bit too, that is where many phosphates come from.

PS I get the film too every couple of days, I just clean it with a magfloat.

The Salt Life!

Current Tank Info: 75g Mixed Reef, 40g Refugium, 100 Gallon sump, DIY Dual Recirc 12" x24" skimmer, 2x175w Halides.
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