I used to spot feed mine every few days with all sorts of frozen foods with no issue.
This system is too young IMO, i know everyone harps on the 6 months to a year, but theres a reason. I jumped the gun in the past adding a nem too soon and it took about 15-30 days before I really noticed it going down hill. IME nem's don't handle salinity swings very well. We haven't even talked about ALK or MG... At this point I highly doubt the food source is the main issue here.
I completely agree, it isn't a food related issue. It's more than likely something else, like you mentioned we haven't dealt much with parameters or other system issues it could be. We're making enclosed ecosystems, and they take some time to fully mature. Sure, the 6 month to a year thing is a suggestion, but it makes sense looking at how long these things take to get completely stable.


