Purigen and Phosguard for lowering already low nitrate and phosphate levels

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Yes the tank is loaded with corals - soft corals, LPS and SPS as well as anemones.

The other question I had is: Can I use panty hose for the bag to hold the media or do I need to buy a micron filter bag. I have read some of these resins are too small to use the panty hose and some aren't.