http://www.aquabotanic.com/barleyarticle.html (control pond algae with
no-poison barley straw---don't know why barley straw is specific to this
task, but all the evidence indicates it is)
http://rds.yahoo.com/S=2766679/K=build+fish+trap/v=2/SID=e/l=WS1/R=120/H=0/IPC=us/SHE=0/SIG=11m20ku9k/*-http%3A//www.iranandworld.com/showarticle.asp?id=44
(small scale fish culture in a geodesic greenhouse---the pond stores a
lot of heat. Insulation keeps it from disappearing into the night sky.
A Fire Department foam generator and homemade bubble solution would be
the most convenient insulation---generate insulating bubbles inside two
plastic membranes---one fastened to inside of wood-frame geodesic, one
fastened to the outside. Bubbles can also act as shade fabric if the
geodesic is used as a greenhouse. Old New Alchemy Institute employed a
similar approach, but with styrofoam balls from Zomeworks.)