My tank has been cycled all has been perfect until last test I test weekly nitrates ammonia and pH on occasion. pH always reads high tap water high I bought bottled water for Betta who recently passed from old age but use tap for guppy tank 10 gallon tank planted plus fake plants for baby hideouts and added driftwood today as pH was off chart and nitrates 80 ppm pH over 7.6 no ammonia nitrites but how can I tell if fish r stressed two original fancy guppy pair bought together n unsure how many babies the two adults act like they want out up n down sides of tank I'm doing small water changes every other day since got high nitrate read took petrified wood out n added driftwood cleaning filter why nitrates so high and should I alter pH more like more driftwood no chemical alterations. They just don't look happy.