http://www.drsfostersmith.com/product/prod_display.cfm?c=3578+3744+3921&pcatid=3921
THE link shows a picture of the thermometer I had.
My question is
What are those little Grey balls?
Will they become dangerous for the fish?
right now they are under the substrate in a corner (not where fish can eat them) will they be ok there?
please help/
thanks
-tom
