Tank size: 36 gallon
pH: 7.4
ammonia: 0
nitrite: 0
nitrate: 10-20
kH: 6
gH: 10
tank temp: 76 f
Fish Symptoms (include full description including lesion, color, location, fish behavior):
Dead with red spots on fins and part of body
Volume and Frequency of water changes:
Around 30% every week...