Interpet freeze dried Tubifex worms are a fantastically versatile food that can be used as a treat or part of the main diet, depending on what you are feeding. They are palatable, high in protein and can be fed to all tropical and marine fish, goldfish and (what I use them for) turtles, frogs and even land crabs! There are many great things about this food, one of which is that it's freeze dried - therefore there is no risk of passing on disease, as there often is with feeding live creatures. It also keeps well and the pack displays no use by date - my pack has been going for a seriously long time and what I have left is still perfectly fine.
They come in a cardboard box with the product info on it, and the worms themselves are in a resealable plastic inner bag; the best thing, I think, about this food is that they are in cube form! This makes it completely mess free and aids in regulating the amount you are feeding. Each box contains 5g of product, and that equates to a lot of cubes (which are approx 1cm x 1cm x 1cm). I can't say for sure how many were in my box as I've had it for ages and used a few of them but I still have 6 left so I'd guess maybe 10 or 12 cubes? Each cube is grey in colour, dry and almost powdery to the touch (though it doesn't fall apart and is not dusty) and dissolves into a LOT of little worms!
I find the best way to feed this, if you only need small amounts, is to use your fingernail to break a small piece off, and rub it between your fingers in the water, using a fingernail to scratch at it too. This lets the worms separate and float about to be snapped up by eager mouths. Of course if you are feeding a larger community tank you can simply drop a cube in - the water will dissolve it over time and I'm sure fishy mouths will nip at it to help it along. The cubes don't have any discernible smell, so nothing to offend there (unlike a lot of 'strange' foods!) They don't make a mess of your tank by clouding the water or anything like that.
As I said, I use it mostly to feed aquatic frogs, land crabs and turtles and I have used it to feed fish as well. They all devour it eagerly, my little frog darts to the surface every time and I can almost see his smile when he realises it's a worm day! For the turtles it's given no more than once a week since it's high in protein, but the other creatures can get it more often. Since the cubes really expand you seriously don't need a lot so this is an excellent value food for a multitude of beasties. I paid £3.69 for it over a year ago if I remember correctly and since I still have about half of it left, I'd say that's good going.
I would definitely recommend this. It's clean, keeps well just at room temperature, last ages, and is a good food in terms of protein. Unfortunately the only thing missing in my opinion is full nutritional information. I like to know details about what I feed my pets so for this it loses a star, as I think that's a reasonably big deal. Apart from that though, it's all good!