This product did not dissolve. I put it in the tank 1 day before the trip to make sure my betta didn't starve and it was bubbling when I dropped it in the tank. I thought it meant it was dissolving but it doesn't. The package says it will take a few hours but I waited all day. The next day I decided to break off a piece hoping it would foam up and continue to dissolve, but that didn't happen. This made the tank cloudy. My fish tried to eat what I pulled out of the piece but she didn't like it and spat it out again. I ended up putting an absurd amount of food in his tank hoping he would eat it all in one day and leave some. My trip lasted 5 days. By the end of my trip it seemed to be dissolving more, but the food didn't come off the block. I am unsatisfied, especially as I have two more backpacks and a trip for 2 weeks in December.
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