Help needed urgently . My Koi are suffering . Meant to take delivery of a nexus 220 this morning and been let down and the order has been cancelled. Was about 600 i was paying now pond it just bei g fed via a very old biotec 10 temp till i get another ideally today /tomorrow. Has anyone got anything decent for sale better or equivalent Only a 3500 litre but want over kill. Wigan area . @