Newbie questions

[Peter H.]

Hello,

 

I've tilapia (mossambicus) growing in a ~30 gallon barrell for about 4 months now and would like to start a small (12"x23"12") grow bed using hydroton as media.

 

This site, especially the 'Rules of Thumb', is immensely helpful, but some questions remain:

1. In the discussions regarding water pumps, commenters expressed concern that the pump should be behind a filter or screen so that solids (fish waste) do not get sucked in.  My impression is that it is desirable for solid fish waste to be transferred from the fish tank to the grow bed where bacteria and worms break it down.  What am I missing?
2. The 'Rules of Thumb' mentions adding Maxicrop Liquid Seaweed to the system.  Will this harm the tilapia?  Should this be added to the fish tank or grow bed?
3. Loop siphons seem easier to implement than bell siphons.  Is this correct?
4. Are the worms a certain type, or can I use the ones found in the backyard?
5. What are the easier vegetables to get my feet wet (was planning to try lettuce, basil and mint)?
6. What method is recommended for growing from seed?  I was planning to sprout in 1" net pots using hydroton, then bury the net pots (with sprouts) in the grow bed media (also hydroton).

Thank you.

 

-Peter.

[TCLynx]

You want the top edge of the bed to be as level as possible.