Recycling SPS?

[crimper]

I used to put crushed corals on my HOB as a filter media on my decommissioned 20G nano, I noticed that the crushed corals depletes as times goes by. I think that they react with the trapped CO2 in foam media and also CO2 from the water itself releasing Ca and Alk back in the water.

I didn't noticed PO4 spike. Maybe it's worth doing some experiments with that Walter

[Reef Pilot]

Originally Posted by crimper

I used to put crushed corals on my HOB as a filter media on my decommissioned 20G nano, I noticed that the crushed corals depletes as times goes by. I think that they react with the trapped CO2 in foam media and also CO2 from the water itself releasing Ca and Alk back in the water.

I didn't noticed PO4 spike. Maybe it's worth doing some experiments with that Walter

Hmmm, I do have a foam in my prefilter canister in my DIY carbon/GFO reactor. Maybe I could stuff the crushed coral in the foam and see what happens.

[Delphinus]

All things being equal I always thought it was clam shells and in particular snail shells that were particularly dirty with PO4 and not ideal for recycling in a calcium reactor. Otherwise though, most aragonite reactor media is just crushed coral, but generally of a more uniform granularity. Basically if you have a means of combating PO4 buildup anyhow (gfo), you're good to go, IMHO.

[Duncans n' Dendros]

I just toss it in the sump and becomes LR.