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Author Topic: New State Record Brown Trout Missouri  (Read 637 times)

Fish Farmer

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Re: New State Record Brown Trout Missouri
« Reply #15 on: Sep 14, 2019, 11:19 AM »

Why wasn't the circular tank self cleaning? All my circular tank systems I built are self cleaning.

It was....for solids...but a biofilm would collect on the surface(it was a plastic liner). If you didn't get in the tank and scrub the bottom every week, you could fall on your butt, it would get so slippery. We did all our spawning/sorting inside the tank, it was easier than lifting 15 to 30 lb  salmon out of the tank.

We had a system, get in the tank, scrub one spot so you could stand up, then cycle through the whole floor, get out and pull the outside sump plug to partially drain the tank.

taxid

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Re: New State Record Brown Trout Missouri
« Reply #16 on: Sep 14, 2019, 11:34 AM »
Interesting.  I've never had issues with biofilm. And I find draining tanks with fish in them, moving fish etc., is a stressor I try to avoid.

I'm going to hatch the trout in an RAS raceway this winter vs. the floating baskets. The baskets collect debris and clog. I think I may have had some gill issues witnessed by some short gill covers. Probably irritation from suspended particles in the baskets. I'm hoping with a raceway I can screen off the fish periodically and clean and flush any debris out. May move them to the circular tank once they get to be a certain size though.

“The trouble with quotes on the Internet is you never know if they are genuine.” —Abraham Lincoln

Fish Farmer

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Re: New State Record Brown Trout Missouri
« Reply #17 on: Sep 14, 2019, 11:46 AM »
If it is a raceway have you looked into baffles?

That is pretty much what my new boss wants to do with our raceways instead of cleaning by scrubbing, drawing down, etc.

I prefer a non fish zone at the back of each rearing area for settling solids. We actually have solid baffles hanging over our end screens inside where only maybe an inch of screen is exposed so the force pushes solids better. You can drain the sump without having the whole tank drain. The only problem it can pin fish quickly if they are small.

taxid

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Re: New State Record Brown Trout Missouri
« Reply #18 on: Sep 15, 2019, 08:22 AM »
If it is a raceway have you looked into baffles?

That is pretty much what my new boss wants to do with our raceways instead of cleaning by scrubbing, drawing down, etc.

I prefer a non fish zone at the back of each rearing area for settling solids. We actually have solid baffles hanging over our end screens inside where only maybe an inch of screen is exposed so the force pushes solids better. You can drain the sump without having the whole tank drain. The only problem it can pin fish quickly if they are small.

I'm looking into all options. Keep in mind this raceway will be small only about 6 or 8 feet long and a couple feet in diameter. I don't hatch many eggs compared to a typical trout farm. One of the issues I also had with the circular tank was, it was quite deep (I've seen redone it to adjust the depth) and then the silly fry would drop to the bottom and be too far down to accurately feed. Fine for when they reach about 4 inches or so but smaller I had issues.

Was going to order a fiberglass trough tank and was all excited as the company AES/Pentair had free shipping if an order was over $50.00. Well of course when I was ready to order they discontinued that. So I will be building one out of plywood and coating it as shipping is more than the tank!

“The trouble with quotes on the Internet is you never know if they are genuine.” —Abraham Lincoln

Fish Farmer

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Re: New State Record Brown Trout Missouri
« Reply #19 on: Sep 16, 2019, 09:52 PM »
We just bought some 250 gallon 5 foot circulars from Pentair to use as start tanks...they're pretty deep and a long reach to the other side. We normally use 12 foot long fiberglass tanks that are 20" wide and 6" to 8" deep to start fry. From there they go to 20 foot raceways that are 3 feet wide by 2 feet deep. We do use baffles in those we made out of black sheet plastic that is flexible.

Once we made mini circulars out of 15 gallon muck buckets. They worked well for starting fry and had steelhead in them for a year, about 20 to 25 fish per tank 4" to 7". We made a drain in the middle with a PVC shower drain which connected to a stand pipe outside the tank which we could unscrew(threaded PVC), it also had a smaller valve off the bottom for slow draining. We would run maybe a gallon or two through the tanks.

 



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