I'm jw what you guys use in your filters for removal of ammonia, nitrates, etc.. I have a 125 gallon tank and have 2 Aqua Clear 110 HOB filters. I've typically just used a cheap brand of the carbon and zeolite crystals mixture. Recently I've gotten API Ammo-Chips and they work great, but having to recharge them every 5 days is a bit of a pain. Any ideas would be greatly appreciated!!