My triton test came back, and my mag is off bye 80ppm !!test kit always reads 1440 came back @ 1360mg/l .. I also use coral color test kits and all of them off bye a lot !my potassium shows high 390/400 really @ 661!!!!!!! Iron -high (no wonder battling hair algae) and also iodine -high!!!! Going to contact Red Sea about this color test kit( 3 months old) they all seem terribly off!!!!