40 cu. ft. oxygen tank, regulator, flow valve/meter and a micropore diffuser. Basically the same set-up George1 uses to revive his HSB when he catches them.

Enough non-iodized salt to make a 0.5% solution and a chemical to nutralize ammonia wouldn't hurt either.

www.hoosierpondpros.com

[Linked Image from lh6.ggpht.com]
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3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).