Do you run your calc reactor with the top sponge filter

[Tangdora]

Hi

New to world of CA reactors. Running a reef octo 220. Been getting a lot of air trapped at the top and under the top foam filter. Any risk to removing the top sponge. Running KORALLEN-ZUCHT Aragonite which is pretty coarse stuff that does not tumble. I doubt a rock would ever get sucked up in the current state but longer term as it starts to melt is there any risk to pump damage as the pieces become finer

 

[KrisReef]

This happens (ime) when too much CO2 is entering the chamber and it forms a bubble that can obstruct the flow of liquid out of the reactor.

Can you post an image of your reactor, or at least discribe what other equipment you are using to run calcium into your system?