katfishguy;1374730; said:i have kept these white knifes (orthosternarchus tamandua)before actually around 6 of them at one time,, they are very sensitive to PH and ammonia, even the slightest change will kill them. but i love these knifes, sometimes they used to put their heads out of the water and eat bloodworms from my hand,, do u have more than one ?