It may not be inadequate for 'appropriate' sampling, but you have to look at what you want to use it for and bang for the buck. If you manage several small ponds as a hobby, you probably cannot afford professional sampling.
Also, if you have Tilapia, they are very difficult to catch. This may be a good way to harvest some of them before they die from the cold. It would be nice to hear from someone who tried it, to see if it is useful at all.
