I do water changes all the time with no dechlorinator. No problems, much easier, and the plants consume the ammonia from the chloramines. I usually do 20-30% water change depending on how the plants look. If they look happy I'll do a smaller change., if they look like somethings missing I'll do a larger water change. Plants love water changes. My tank always looks so vibrant after a water change, and the fish seem so much more active.