I'm really impressed with them. I took them because I was tired of fishing for leaves from the aquarium when they had already passed their usefulness; I have quite a few 5 gallon Betta aquariums and despite the simple packaging they are /huge/. They're easy to tear if you overdo it when opening, but they're GREAT for small aquariums. I've used them all at once (I have some old fish that use almond flakes for health reasons) and they darken the water significantly, even with purigen in the filters. They appear to be the perfect concentration to provide health benefits without being completely filtered by my settings. They've only been out a day so I'll probably come back and edit them in a while, but I plan to buy them again.
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