Tropical Fish Forum
Tropical Fish Keeping Help and Advice => Fishtank Filtration and Cycling => Topic started by: Yorkshireadam on October 18, 2014, 09:37:26 PM
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When I was a lad I worked a summer for my dads friend who had a fish farm and a pond maintenance company, when creating new pond filters he used tons of Alfagrog as a filter media, I'm just curious as to whether a few 'stones' would be useful in a reasonably small 120l aquarium or is it overkill?