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july 7th seedlings planted 5/15

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Comment by Earl ward on July 9, 2011 at 8:09am


The Rockwell is pretty quite considering the amount of air its pumping; I have a muffler- air cleaner on the intake side. It’s not a regenerative blower but actual oil less compressor. I took the spare and pumped up a whale pool for my grandson it was full in about 4 min. I bought both mine, from a guy on eBay

Comment by David Waite on July 8, 2011 at 11:07pm
Though with that kinda growth you had the air cranking. I want to expand my rafts but really hate the noise of the blower and dont want the neighbors to hear it as well. Experimenting with a venturi fed off of a submersible but still in  the planning mode.
Comment by Earl ward on July 8, 2011 at 7:29pm


I have a used Rockwell air pump, 10 stones in the fish tank and 18 in the raft. The pump puts out 7ml of air at 20 feet of depth. I also miscalculated the power consumption, I forgot to include the air pump it is a 1/3 hp pump, the water pump is 300 watts.

Comment by David Waite on July 8, 2011 at 6:26pm
Earl what are you doing for air in your raft tanks. Hope you dont mind the questions.
Comment by Earl ward on July 7, 2011 at 10:45pm


Nothing is removed from the system bio filters designed by me 3- 55 plastic drums in series the whole system runs on 300 watts of power.

Comment by David Waite on July 7, 2011 at 10:36pm
Wow impressive fish load. Whatever you are doing its working great. Thanks for the reply.
Comment by Earl ward on July 7, 2011 at 10:32pm

950 tilapia range in size from 4-8 inches weight ¼ lb to ¾ lb 6500 gallon pool also 100 red minnows in rafts 2 -40 x 4ft rafts. not many supplements added 1 cup of chelated iron mixed with 5 gallons water this week.1 quart of maxi crop at the beginning, bacteria, ammonia during fishless cycle added fish 5/01/2011 ran without plants until 5/15. Nitrates 7/07/ this morning were 40ppm, ammonia 0 nitrite 0. Flow is 5-8 gallons per minute.

Comment by David Waite on July 7, 2011 at 4:49pm
Impressive, congrats. You should talk a little about fish load and what supplements you are using. Great job.

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