July 1, 2012 - Saw some cool things at the Kansas City Maker Fair related to aquaculture.
Intermediate Bulk Containers IBCs can be used as fish ponds for aquaponics.
A bell syphon can also be used to completely drain a aquaponic system.
Duck weed can be used to feed chickens and other livestock. It doubles mass in 24 hours, and has a protein content on the same order as soy bean. It also purifies water of nitrates and phosphates.
Oct 3, 2017 -We measured the holding capacity of an 8 inch cube of rockwool to be 45%.