okay so we just did our weekly water change and we notice our 18'' rtc was gasping for air and twitching... we tested our water and we have extremely hard water.... bad alkalinity and our ph is in the alkaline.. VERY HIGH.. what do i need to do to stablize my water for my baby RAMBO... i'm scared i don't wanna lose him.. please help asap.... thanks in advance!! <3 Lacey