DI Resin Cartridge 10" Color Changing

Works great. Wish they lasted longer

Good product and price

Ive bought DI cartridges from a lot of different vendors over my 20 years in the reef keeping hobby, and I've settled on these based on price, longevity, and quality of service. They do charge for shipping, but if you buy a bunch (5+) at a time these are a very good and cost effective option (definitely better than the choices at BRS).

My go to cartridge

Tried a lot of different brands (spectrapure, brs,etc) and this is my go to in terms of value. Price is similar to the brs cartridges, but the quality is so much better. The spectrapure cartridges are similar (maybe a little better in terms of capacity) but significantly more expensive. These work great, even with the very hard water we have here in southern California.