I posted a while ago asking for external filter suggestions for my tank but not that I have saved up some money I can't find the post again so, I need a new filter for my tank, it is 138 litres/36ish gallons I think and contains 5 guppies, 5 albino cories, 1 bristlenose pleco and 1 pearl gourami. In the future I hope to add 2 bolivian rams too. I currently have an interpet pf3 and an interpet pf1 (or possibly interpet mini, I can't remember) running in it and they just don't seem to be coping with the amount of waste, mainly produced by my pleco lol. They get clogged quite frequently and my water never looks as clear as it does in my goldfish tank which has better filtration. I don't overfeed and my levels are fine, I do weekly water changes and have a test kit, I just want a new, better filter and also then ill only have 1 filter instead of 2 taking up room in my tank. I don't mind if its an internal, external, HOB etc, just need some suggestions as I don't really have any idea about filters :s it needs to be available in the uk, from amazon or ebay if possible and needs to be a reasonable price. I don't really want to spend much more than around £65 ish? Any replies are appreciated, thanks