Hi, came home to find small RBT chopped up. Newbie mistake, yes. We have done everything we can, cleaned it up, water change, parameters are fine. The only carbon we have is fitted for another filter, a flat square insert for an HOB freshwater filter. We’ve angled on in to the media basket of our 32 biocube. (Stores are all closed, Saturday eve in a locked down city.) any other advice? The two fish are fine so far— wondering how long until we can assume they are out of the woods.