[nealf_2000]

I've tried Rich Earth in a 5 gallon Hex aquarium over the weekend and I got an immediate ammonia spike. Cross this one off my list for aquariums. I don't know if "humate shale" contains ammonium, or if the manufacturer added ammonium humate to the product without stating so on the packing.

Originally Posted by nealf_2000

Just to let everyone know that I have identified to cheaper alternatives to Diamond Black. I will be trying out Rich Earth over the next few months.

1) Earth Green Menefee Humate
http://www.earthgreen.com/story.html#humate
- $28 for a 50lb bag plus shipping
http://www.7springsfarm.com/catalog.html#menefee

2) Rich Earth
locally available in my local garden center ($13 for 5 lbs)
http://www.richearth.net/frequently_asked_questions.php