angle

hello all, I have been having a problem with very high ammonia all the time in the 8ppm range. i have done 50% water changes every other day for 2 weeks and I cannot get the levels to get past about 6ppm. I don't have any dying plants or fish. fish are acting normal and plants are thriving. i...

Tank size: 20 us gallon high pH: unknown ammonia:unknown nitrite:unknown nitrate:unknown kH: unknown gH: unknown tank temp: Upper seventy's lower eighty's. Fish Symptoms (include full description including lesion, color, location, fish behavior): Angel fish was fine when I put it in yesterday...