500 HO+ / 800 HO+ (Ebay UK / EU): https://ebay.to/2XIwJfX Spare mesh trays (Ebay UK / EU): https://ebay.to/2FcAaEk 500 HO+ / 800 HO+ (Amazon): https://geni.us/ZtUAoLj US Version of filter (Amazon): https://geni.us/yB35tMy Foams for intake pipe (UK): https://geni.us/vv1t Foams for intake pipe (US): https://geni.us/LjSi1V Foams and Biohome media: http://www.filterpro.co.uk (FilterPro site has links to suppliers in other countries) Biohome Ultimate on Amazon UK: https://geni.us/GDV8oLd Biogravel on Amazon UK: https://geni.us/o98PP Another very affordable filter from All Pond Solutions which has an equivalent in the US to keep my viewers over the pond happy. Considering how much media this filter holds, flow rate and features it packs a lot into a relatively small package - I love the idea of a removable 'cartridge' which has media baskets which can be filled with media of choice. Good stuff. WHAT IS A FULL CYCLE? *If someone tells you the aquarium nitrogen cycle ends with the production of nitrate that is incorrect - please read on* A full cycle is completed by bacteria - the aerobic part of biological filtration which processes ammonia to nitrite and nitrite to nitrate followed by an anaerobic part which processes nitrate into soluble nitrogen which bubbles off to the atmosphere. Therefore it requires a suitable amount of excellent quality filter media to be able to provide the environment for both aerobic AND anaerobic bacteria - that is what Biohome ultimate does perfectly but even with such good media there are limitations and we recommend the following amounts for different stocking scenarios: (1 US gallon = 3.8 litres) (1kg = 2.2 lbs) Average community tropical aquarium = 1kg per 100 litres Average coldwater aquarium = 1kg - 1.5kg per 100 litres Predator aquarium = 1.5kg - 2kg per 100 litres Large cichlid aquarium = 1.5kg - 2kg per 100 litres Malawi / Tanganyikan aquarium = 1.5kg - 2kg per 100 litres Marine aquarium = 1.5kg - 2kg per 100 litres Average mixed fish pond = 1kg per 200 litres Average koi pond = 1kg per 150 litres You may be disagreeing with the above figures but remember that they are for a FULL CYCLE not half a job - achieving 0 ammonia and 0 nitrite is quite easy since aerobic bacteria grows freely on any surface but the anaerobic bacteria responsible for COMPLETING the cycle needs more a specialized habitat. Size a filter properly, set it up sensibly and you will have perfect water - it's that simple....and your filter won't be the dreaded 'Nitrate factory'. This series of videos is all about trying to squeeze more efficiency out of internal and external aquarium filters which generally have a limited filtering capacity - If you have a filter you'd like me to feature in a video then please contact me on: sales@filterpro.co.uk ... https://www.youtube.com/watch?v=leJBzXT68L4

A chelsea trellis fence and gate erected at Corbridge in Northumberland. http://www.pondguru.co.uk ... https://www.youtube.com/watch?v=CPPDFL1zZpk