"...my tank is pretty full. It looks great. Water is clear. All ammonia, nitrate, and nitrite levels are non existent now... I have not lost a fish since the block has been in there. I do not have to do water changes anymore. Very nice job creating this. I wish more people would read this and try it for themselves. I'm sure everyone would be pleasantly surprised. Thank you for making this hobby a little easier!"
A member of the Jersey Shore Aquarium Society in New Jersey - Mr Sciarilla