Here is the list - mainly complete but does not include every little things I can think of!
water pumps
air compressor (aquarium types)
all testing combo/kit to check quality water
if building rafts system - the liners (if you have the space and budget)
plastic connectors like these ones http://www.aquaticeco.com/search/0/bk112 - still unable to find where these are being sold in Costa Rica
Ro…