All Discussions Tagged 'temp' - Aquaponic Gardening2024-03-29T15:56:13Zhttps://aquaponicgardening.ning.com/forum/topic/listForTag?tag=temp&feed=yes&xn_auth=nowater heating advisetag:aquaponicgardening.ning.com,2015-11-17:4778851:Topic:6184572015-11-17T02:04:21.113ZStevedNETNhttps://aquaponicgardening.ning.com/profile/StevedNETN
<p>Hello,</p>
<p>I have built a system that I believe contains about 600 gal of water. My grow bed contains 3 tons of gravel and is 4*16' and a dwc bed 4*8'. </p>
<p>My greenhouse is 24*32 and single ply plastic. </p>
<p>I live in kingsport TN where out fall and winter is rather mild. 2-3 weeks in Feb will stay below freezing.</p>
<p>My water temp has been swinging from 50-60 deg .</p>
<p>I have 40 +/- goldfish between 4-8" </p>
<p>My question is two fold. </p>
<p>Is it necessary to heat…</p>
<p>Hello,</p>
<p>I have built a system that I believe contains about 600 gal of water. My grow bed contains 3 tons of gravel and is 4*16' and a dwc bed 4*8'. </p>
<p>My greenhouse is 24*32 and single ply plastic. </p>
<p>I live in kingsport TN where out fall and winter is rather mild. 2-3 weeks in Feb will stay below freezing.</p>
<p>My water temp has been swinging from 50-60 deg .</p>
<p>I have 40 +/- goldfish between 4-8" </p>
<p>My question is two fold. </p>
<p>Is it necessary to heat the water. If so, does anyone have a reasonable idea the cost to heat with electric heaters?</p>
<p>I would prefer to select crops that are cold tolerant and not heat the system. </p>
<p></p>
<p>Any thoughts or advise would be great.</p>
<p></p>
<p>Thanks </p>
<p></p>
<p></p> Tilapia vs Yellow Perch for Breeding and Growthtag:aquaponicgardening.ning.com,2013-01-31:4778851:Topic:4346222013-01-31T03:05:32.312ZPatrick Rochehttps://aquaponicgardening.ning.com/profile/PatrickRoche
<p>I’m trying to decide whether to grow Tilapia or Yellow Perch in my future AP system. I need a better understanding of the breeding and growing process (pros and cons) for both species to make my decision. I’m in New England where it gets pretty cold in the winter, would put insulated tanks in a greenhouse, and I’m open to heating the water enough for either species. The slightly lower temps of the Yellow Perch are appealing (low/mid 70s optimal but can tolerate much lower vs low 80s for…</p>
<p>I’m trying to decide whether to grow Tilapia or Yellow Perch in my future AP system. I need a better understanding of the breeding and growing process (pros and cons) for both species to make my decision. I’m in New England where it gets pretty cold in the winter, would put insulated tanks in a greenhouse, and I’m open to heating the water enough for either species. The slightly lower temps of the Yellow Perch are appealing (low/mid 70s optimal but can tolerate much lower vs low 80s for Tilapia). On the other hand, Tilapia breeding seems to be more reliable and involve less time and labor. Below I’ve summarized my current understanding and posed some questions. Please correct my inaccuracies and provide answers to my questions where you can!</p>
<p> </p>
<p><strong>Summary & Questions:</strong></p>
<p>Tilapia are more prolific breeders (up to every 5 weeks), whereas Yellow Perch breed once per year. To induce spawning in Tilapia requires the same temps as for grow out (low 80s); but to get Yellow Perch to spawn they need a prolonged period of cold (45 degrees) and then a change in photoperiod to simulate winter coming into spring.</p>
<p></p>
<p>For both species, you would move breeding pairs into a smaller, separate tank, probably with a substrate for putting eggs on, and let them breed. Female tilapia will put fertilized eggs in mouth, and after the eggs hatch and reach fry stage, they won’t need to be in her mouth anymore, at which point we can remove the female from the breeding tank. Yellow Perch females just deposit their eggs, so they can be removed from breeding tank once the eggs have been laid and fertilized. From there, the Tilapia seem a bit easier as the fry can eat commercial powdered food, but Yellow Perch fry need some live food (such as algae and zooplankton) and a controlled photoperiod. At some size (not sure what), Tilapia fry can be mixed back in main tank with adults because cannibalism is low. Is the same true with Yellow Perch?</p>
<p></p>
<p>And finally, Tilapia can grow faster and get larger than the Yellow Perch too. Tilapia can get up to 1.5-2lbs in a year; Yellow perch more like 1/3 of a pound.</p>
<p></p>
<p>Most of my research comes from:</p>
<p>Yellow Perch – North Central Regional Aquaculture Center: <a href="http://storage.ning.com/topology/rest/1.0/file/get/2656376931?profile=original">http://storage.ning.com/topology/rest/1.0/file/get/2656376931?profile=original</a></p>
<p>Tilapia – North Central Regional Aquaculture Center: <a href="http://www.ncrac.org/oldfiles/NR/rdonlyres/574B353A-B11F-4DD7-8A87-23E708DE95A0/0/ncrac114.pdf">http://www.ncrac.org/oldfiles/NR/rdonlyres/574B353A-B11F-4DD7-8A87-23E708DE95A0/0/ncrac114.pdf</a>; the Aquaponic Source <a href="http://theaquaponicsource.com/2011/03/27/aquaponics-tilapia-breeding/">http://theaquaponicsource.com/2011/03/27/aquaponics-tilapia-breeding/</a>; and Southern Regional Aquaculture Center <a href="http://ag.arizona.edu/azaqua/extension/flyers/Pond_Culture_Tilapia.pdf">http://ag.arizona.edu/azaqua/extension/flyers/Pond_Culture_Tilapia.pdf</a></p>