I just have a question about water softness and hardness. Right now we have a water softner for our water, so the water is well, soft. I've read numerous times that a water softner isn't great for fish, so the situation I'm in might be a plus. I'm moving in three weeks (moving the tank will be fun ) to a new house, which will not have a water softner, and the water will be pretty hard. I'm looking at a basic school tank (5 zebra danios currently in the 55g) and it's a bit too late to even consider switching to cichlids. Are there any natural things I can put into the tank to soften the water or any recommended treatments?