The mushroom farm will be a 2X4 meters rectangle with 2 meters height.
I will be using this water pump: http://viewitem.eim.ebay.pt/200GPH-Aquarium-Air-Water-Pump-Fish-Tank-Submersible-Pond-Fountain-Powerhead-12WEU230V/310569179711/item?variant0=EU-230V&transId=337425859021 with the EU plug (230V)
I'm currently growing Pleorotus (in bags) and Shitakee (bags and logs)