So i have 3 wilma 4 pot systems and i want to link together each of the reservoirswit pipe so i can be sure that everything (ph, ec, temperaure etc) is consistent across the 3 systems and also i would oly have to top up one res instead of each of them individually. Can anyone give me a list of items i would need to do that so that its all water tight and shit? Heres a pic if you arent familiar with the wima systems. The tray the pots are in is on top of the resevoir and i'm tryng to connect 3 of them. Also if anyone could go a step further too and tell me how to link them all to a bigger main water butt and create some sort of system with a ballcock which would then keep all the reservoirs topped up automatically