So my water has been quite hard so I've been researching economical ways to keep it down. First, I took out the cuttlebone. I give small pieces with their food so that I'm not adding calcium to the tank. I got a better filter also and was looking at things to put in it and I was hoping to find something to aid in water hardness and I found some thing on oak leaves and aquariums. Here is an article on it
http://www.google.com/url?sa=t&source=w ... VPltMdAdHA
Anyone know anything about it?
Any opinions ?

