I couldn't find an Easypro stockist in the U.K but I have found an alternative to the Aquascape Aquablox. I'm planning on using my existing pond for my bog filter which is 12 foot by 6 ft approx and then dig a new pond. As there is a bit of a slope, I can have a waterfall into the pond and then an intake bay for the pump. The storm crates are 100 x 100 x 400 mm and hold 400 litres of water. I can fit 4 in the existing pond which will give me a reservoir of 1600 litres so how do I calculate how much water I can filter? my existing pump is an Aquaforce 14000 which they say has a flow rate of 6000 litres per hour and is suitable for a pond with goldfish, up to 14000 litres. By these calculations, I am going to need another pump. The pump can be used amphibiously so I was planning on doing this as it makes it easier so I could just double up on my existing pump. I've had it 12 months and I'm impressed at how well it handles solids. Do you have an other suggestions? I have the space to build the pond to any size but I am restricted to the size of the bog filter can manage. I would like to keep a few koi and shabumkins. Any other ideas?