Chalkbrd
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  • South Bend, IN
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Chalkbrd's Discussions

Trouble with breeding, no fry

Started this discussion. Last reply by Jeff S Dec 27, 2013. 8 Replies

I need some ideas to check because for some reason our tilapia are just not reproducing.  We never had problems before (started with 14 and had a max of 12,000 at one time and are down to about 8,000…Continue

Tags: fry, breeding

Adding in freshwater prawn (aka shrimp) in a raft system

Started this discussion. Last reply by estevan chaparro Mar 17, 2013. 3 Replies

My 84-year-old father (who currently is raising about 9000 tilapia) asked me the other day what I thought about raising freshwater prawn.  We've recently started to get into aquaponics, and we've had…Continue

Tags: prawn, raft

Weight calculations

Started this discussion. Last reply by Brad Sep 13, 2012. 5 Replies

I'd like to know if my weight calculations are sound (based on US units).  I'm trying to determine how much weight my system will be so I can make sure I have sufficient support for that weight where…Continue

 

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Latest Activity

Jeff S replied to Chalkbrd's discussion Trouble with breeding, no fry
"Will the mother eat the fry if left in a separate tank with them? "
Dec 27, 2013
Chalkbrd replied to Chalkbrd's discussion Trouble with breeding, no fry
"I'm wondering if that is part of the problem as well, that some of them are being eaten.  Normally my dad does scoop them out when he can see them (he figures by the time they get big enough for him to see, they are big enough to be…"
Jun 23, 2013
Kenneth J Roche' replied to Chalkbrd's discussion Trouble with breeding, no fry
"If you are seeing 'some' fry then they are breeding and most likely the fry are being eaten. I try to pull my fry 7-12days from the moms to avoid that. But sometimes I am to late, for example my biggest best female had a mouth full of 7day…"
Jun 22, 2013
Hydroponics Curacao replied to Chalkbrd's discussion Trouble with breeding, no fry
"Is a water heater expensive? Mines don't breed either. Maybe I'll have to make the temperature higher. Today I saw a few fry though. Aftee many months"
Jun 21, 2013
Kenneth J Roche' replied to Chalkbrd's discussion Trouble with breeding, no fry
"When my water temps get to upper 70s to mid 80s the gals really start to breed heavy."
Jun 20, 2013
Chalkbrd replied to Chalkbrd's discussion Trouble with breeding, no fry
"My dad informed me that he finally saw some fry in the tank today.  The only thing we can figure is that the water was in the lower 70s and now it is in the mid to upper 70s so the spawning urge finally kicked in."
Jun 19, 2013
Chalkbrd posted a discussion

Trouble with breeding, no fry

I need some ideas to check because for some reason our tilapia are just not reproducing.  We never had problems before (started with 14 and had a max of 12,000 at one time and are down to about 8,000 now), but we haven't had any babies for three or four months (which is obviously going to set us back for future sales).  The water quality is fine, there are relatively few in the tank so they have plenty of room, the water temperature has been in the 70s, feed is the same we've been feeding…See More
Jun 17, 2013
estevan chaparro replied to Chalkbrd's discussion Adding in freshwater prawn (aka shrimp) in a raft system
"Might take a look at crawfish rather than prawns. http://farmingcrawfish.com/"
Mar 17, 2013
Chalkbrd replied to Chalkbrd's discussion Adding in freshwater prawn (aka shrimp) in a raft system
"Thanks for the reply, David.  Yes, that's as I understand it too. They don't reproduce in fresh water so if you're doing them on a large scale, you'd either have to have a saltwater nursery or keep buying juveniles (which…"
Mar 4, 2013
David - WI replied to Chalkbrd's discussion Adding in freshwater prawn (aka shrimp) in a raft system
"We looked at them. 1) They apparently don't reproduce in fresh water so we would have to keep buying juveniles. 2) They need up to 2 square feet each; which is just too much space to grow enough to make it worthwhile. Search for…"
Mar 4, 2013
Chalkbrd posted a discussion

Adding in freshwater prawn (aka shrimp) in a raft system

My 84-year-old father (who currently is raising about 9000 tilapia) asked me the other day what I thought about raising freshwater prawn.  We've recently started to get into aquaponics, and we've had a small 50 gallon tank with about the same sized grow bed since July 2012 (hydroton-filled, flood/drain...a very small test system). So I started wondering if it would be possible to do a trifecta-type thing and add freshwater prawn into an aquaponics system along with the fish.  (Dad's really more…See More
Mar 4, 2013
Chalkbrd replied to Chalkbrd's discussion Weight calculations
"Okay, thanks.  I'm working on a kind of different type of material for a grow bed so I needed to plan for what kind of weight it was going to need to contain.  I'm going to plan on about 1000 pounds for a bed that size. Thanks!"
Sep 12, 2012
Chalkbrd replied to Chalkbrd's discussion Weight calculations
"So essentially just go with the weight of the water and ignore any weight from the Hydroton? "
Sep 12, 2012
Chalkbrd posted a discussion

Weight calculations

I'd like to know if my weight calculations are sound (based on US units).  I'm trying to determine how much weight my system will be so I can make sure I have sufficient support for that weight where I want to put it.If I have a 2' x 8' x 1' grow bed, that would be 16 cubic feet, which would mean approximately 120 gallons.  I read somewhere that a 50 liter bag of Hydroton weighs about 65 pounds.  120 gallons would be about 454 liters (I'm rounding numbers).  If 50 liters weighs 65 pounds, then…See More
Sep 12, 2012
Chalkbrd is now a member of Aquaponic Gardening
Aug 27, 2012

Profile Information

How did you find us?
other
Are you an aquaponic gardener already?
Yes
If so, what type of system? (pick all that apply)
flood and drain media
How old is your system?
Just started
What type of fish do you grow with? (select all that apply)
Tilapia
How big is your fish tank?
50 gallons
Please tell us something else about yourself.
It's actually my 84-year old father who is the fish farmer, and who is just starting to get into aquaponics (although he's raised fish since he retired in his early 70s, mostly striped bass but now tilapia). He set up his first (test) grow bed in July 2012 off of a 50-gallon tank, and he'll help me set mine (also 50-gallons) up on my back porch very soon. Once we get the hang of the gardening aspect, he wants to put in grow beds to help filter the water for his 4000 or so fish.

Comment Wall (2 comments)

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At 3:47pm on September 7, 2012, Sylvia Bernstein said…

I'm glad you enjoyed my book...thanks for that!

At 8:27am on September 4, 2012, Sylvia Bernstein said…

Welcome Chalkbrd!

 

Thanks for joining the Aquaponic Gardening community!  I hope you find it a fun place to explore aquaponics.  There is a real blend of experienced and new aquapons in this community, so please don’t hesitate to get in there and start asking questions.  Everyone is quite happy to help out new members--no question is too basic. 

 

A great place to start is to read the “How to Use This Site” link on the upper right corner, “Start Here” section of the Home page.  You might also find the “Aquaponic Gardening Rules of Thumb” guidelines helpful.

 

Please participate and check in with us every day!  We are constantly posting news about aquaponics and the good food movement.

 

Thanks again for joining us, and I look forward to getting to know you.

 

Sylvia 

 
 
 

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