Well ive actually been underfeeding for a bit...not really by choice but im never around so they get a little food when they can with just enough for the bottom feeders to scrounge on.
About the nitrate readings i went to go test
ammonia today and wouldnt ya know it my last graduated tube for reading just shattered when i opened it

i do need to get pictures of it up i guess ill start another photobucket account.
If its any points up until last week i had been checking ammonia regularly and its been fine. Its heavy planted so its usually very stable