I posted this article as a teaching guide. The articles that teach how to neutralize the ph may not apply as safe treatment for frogs. The best thing to do to keep waste products at a minimum is to do partial water changes, change your filter pad in your filter as recommended by the filter instructions or a minimum of every 3 months, to remove visible waste contaminates such as feces and dead crickets, and to maintain the proper tank to frog or fish ratios according to the size of your tank, basically avoid overcrowding. Adding live plants helps also due to their oxygen producing qualities. Aerating the water with a fine bubble stone may also help for those who do not use a filter. Weekly water changes should be done for a non-filtered pond, and daily water changes for a water bowl.

Hope this helps .