From garden ponds filled with Koi Carp to the humble goldfish bowl (although goldfish need far more room to thrive - replace it with a tank) – the UK is a nation of fish lovers.
According to the Pet Food Manufacturers’ Association there are an incredible five million indoor fish tanks in Britain.
That equates to around 10 per cent of British households owning pet fish – putting them third after cats and dogs when it comes to most popular pet.
There’s lots of choice when it comes to adding fish to (well prepared and correctly set up) home aquariums, with pet shops offering a bewildering range of colourful and interesting finned friends.
But you’ll definitely want a few bottom-feeders in your freshwater tank - fish (and other creatures) that will hoover up any food that sinks to the bottom and keep algae under control to make sure the water stays crystal clear.
Here are 15 of the best that should top your list.
13. Siamese Algae Eater
The Siamese Algae Eater is very much a fish that 'does what it says on the tin' - gobbling up algae all day long. Simple to care for they are perfect for beginners and get on with pretty much anybody else they are sharing a tank with. | Canva/Getty Images
14. Crystal Bee Shrimp
They may not be fish, but tiny Crystal Bee Shrimp make a great addition to any aquarium. It's fascinating to see then scuttling around the bottom of the tank, cleaning as they go, and they don't tend to bother the fish. | Canva/Getty Images
15. Freshwater Snails
Many aquariasts overlook Freshwater Snails but they are a great addition to your watery ecosystem, hunting down the smallest pieces of algae. They are incredibly low-maintenance, don't hassle any of their tankmates and are never done cleaning up. There are many species to choose from, but all carry out the same task. | Canva/Getty Images