Filtration with a skimmer
To filter the water of your (swimming) pool or hottub it is also possible to use a simple skimmer. You can hang the skimmer the edge of your hottub or pool.
For the use of this skimmer there are several rings available.
Sponsfilter of cartrigde filter
For the filtration you can choose between a sponsfilter or cartrigde filter. A sponsfilter is easier to clean but a cartrigde filter has a longer lifespan.