hi guys im just after as many pics of plumbing of trickle systems, i have set up one but it just wont drain properly i have all tanks plumbed with 20mm bulkhead fittings and 25mm hose all seperate drains to the sump, maybe this is my problem? its just that i cant have much flow into the tanks or they overflow.. maybe i need to connect a few drains together going to the sump to create more sucking action?

any help would be appreciated

Jamie