<human>: Ok, so I work at a large chain pet store where we sell a ton of animals, but also lots of live freshwater fish.

This customer came in a few days ago and I helped her get a live plant and some water conditioner so she could do a water change on her [Brookstone Frog-o-sphere](

Anyway, we chat for a bit, then she buys her stuff and leaves. Then yesterday she comes back with a very sad look on her face. She said she did her partial water change, added the water conditioner I sold her, and within the next 2 days, her frogs and betta started acting really weird, and eventually died. Even weirder was when she went to clean the tank out. She said after she poured out the "living gravel," a whole bunch of leached gravel color/paint came out as well. She said in all her times of changing the water before, she never saw the leached color. This brought her to the conclusion that the water conditioner must have somehow been the culprit, since this was the first time she used it and not 24 hr distilled tap water.

Is that possible? I've used and recommended water conditioner for years and never had or heard of this problem. We don't sell them, so I've never seen a frogosphere in person and don't know much about them, except the general online consensus that they are small, poorly designed death traps for dwarf frogs. But that seems kinda wacky that water conditioner would cause the gravel to leak its color and kill the tank.

What is going on here?? Anyone else heard of this or had it happen? According to the customer, no where in the directions does it say do or do not use water conditioner, so we are both stumped. I did a light search online and can't find anything relating to this issue at all, which strikes me as odd that this would be such an isolated occurrence.

Condense the text into a few key points
<bot>: frogosphere gravel leaked paint into tank and possibly killed fish and frogs. Is water conditioner to blame or brookstone?