Cal rx media , top off or replace if some what mushy

[saltwatersig]

Well the first chamber of a dual chamber reactor is about half way empty (ok maybe a little more than halfway) and after noticing some of the media turning to mush (not all just some spots) , I chk'd ph level and they were too low from first chamber. I adjusted co2 drip and effluent drip so ph is correct now.

Question is do I just topoff the media in the first chamber or do I remove all the left over media and replace all the first chamber media ?

Would having less than half the media in first chamber have caused the drop in ph coming from that chamber ?

 

[euod]

I usually take it offline and rinse the remaining media and topoff with new media.
I think the two fishy media does not turn to mush. I am using that now and seems pretty good.

 

[Crabby]

I also remove, rinse, replace what isn't mush and then top off with fresh.