Hello, I have small kenyi cichlids in 32 gallon tank...every now and then the fishes seems like scratching their sides on sand or leaves or on filter intakes...the tank is cycled. Nitrates are 10 or 20ppm.. Water source is fresh ground water(only source i have) ph is 8.2 and not sure about hardness level but im sure its high bcoz when i soap my hands in the water the soap immediately clears off.. All fishes do that..its like something in the water that irritates them..I dont smell chlorine since its directly from the ground..I used prime before but its the same..I added 22 drops for 11 gallon when doing partial water change..bcoz im advised to dose 2 drops per gallon..IS that right? Also should i age the water after adding prime? if so how long? Or will it be ok if i age the water without prime for 3-4 days? Could heavy metals like Iron cause this? Or Could it be bcoz of the stray voltage? I dont feel any current in the water ... What could be the reason? its really frustrating to see the fishes suffer and i have no idea why...Please help..