Hi...I posted the other day because my Mappa is super stressed and wont even eat. I am sure I might have over fed him..his tail is curved so I learned that he might be constipated. I have yet to try the remedies ( which so far I hear is either feeding him peas or an epsom salt soak. ) He is not eating at all. I have a 29 gallon biocube. The NItrate level is at between 10 and 20. My NItrites are at 0. I have done 7 gallon water change with sea water/distilled water mix. PH seems fine and low or 0 ammonia. This fish is in there with just sand and rock. I bought it purple already so the salesmen said it didnt have to cycle..that long and my fish was fine for a few days. I am getting sad and I dont want him to DIE !!!!!!!!! but I CANT GET THE NITRATES DOWN... PLEASE HELP !!!!!!!!!