Hey all i recently got myself an arowana. Hes about 6" long amd hes awesome. Ive always had reef tank but couldnt resist on this guy anyway i had a few questions about water quality and testing. When i check kh it takes 4 drops to make it yellow and when testing gh it takes 11 to make it green what can i do to lower these numbers and what should i shoot for 3 correct?
