AquaVitamins Posted September 28, 2009 Report Share Posted September 28, 2009 Im trying to breed my cory's. Can i get away with only turning the light on when i feed them? which would be about 2 hours a day? The tank during the day has reflected light on it from the walls, so its not pitch black. Are they not they mostly blind any ways? Quote Link to comment Share on other sites More sharing options...
SamH Posted September 28, 2009 Report Share Posted September 28, 2009 I don't think any fish NEED light expect (EDIT: some)fry which need the light for development. In which case the lights to should be left on for 12 hours+. I've heard of guppies getting all deformed due to lack of light so some breeders leave the lights on for 17 hours. Unless there's any plants you'd like to keep alive, lights aren't needed. HTH Quote Link to comment Share on other sites More sharing options...
Caryl Posted September 28, 2009 Report Share Posted September 28, 2009 They don't need light. In fact, they may breed more readily in low light! Quote Link to comment Share on other sites More sharing options...
smidey Posted September 28, 2009 Report Share Posted September 28, 2009 I don't think any fish NEED light expect fry which need the light for development. In which case the lights to should be left on for 12 hours+. I've heard of guppies getting all deformed due to lack of light so some breeders leave the lights on for 17 hours. Unless there's any plants you'd like to keep alive, lights aren't needed. HTH I am interested in this comment, fry of what species need light. is it just guppies? the reason i ask is that none of my grow out tanks for africans have lights at all. Quote Link to comment Share on other sites More sharing options...
Caryl Posted September 28, 2009 Report Share Posted September 28, 2009 I am not sure any fry need light, even guppies. Light is for the plants. Quote Link to comment Share on other sites More sharing options...
SamH Posted September 29, 2009 Report Share Posted September 29, 2009 Lighting is also an important aspect in the growth of guppies. Many breeders keep the lights on anywhere between 12-17 hours. Strong bright lights are not necessary, but guppies that live in a dim tank will often form deformities of the spine. Lights should not be kept on around the clock so that the fish can rest and relax for at least 7 or 8 hours. Quote Link to comment Share on other sites More sharing options...
smidey Posted September 29, 2009 Report Share Posted September 29, 2009 maybe the little retards get a deformed spine from swimming into the glass all the time :lol: i know that africans don't need light at all. Quote Link to comment Share on other sites More sharing options...
phoenix44 Posted September 29, 2009 Report Share Posted September 29, 2009 Most if not all living organisms need sunlight. Survival and all. im sure fish absorb something or the other from light, that's what makes pond guppies so bright and healthy looking! Quote Link to comment Share on other sites More sharing options...
Nymox Posted September 29, 2009 Report Share Posted September 29, 2009 Id have to agree there to any creature whos natural enviroment has sun light, we ourselves need sun light for vitamin D so I can only imagine the same applies to most living creatures. With the exceptions of extremeophiles who get their energy from other means. I remember there being a post on here not so long ago about guppies having spine deformaties. How ever, I wouldnt worry too much about the corys if they get natural sunlight in there for a few hours a day it should be enough, we only need 5 mins of sunlight on our hands to get our daily vitamin d requirements. I only have the sun as my lighting, corys and bolivians spawned to must be plenty. Quote Link to comment Share on other sites More sharing options...
smidey Posted September 29, 2009 Report Share Posted September 29, 2009 cool, how much like the sun are the standard lights that are most commonly used? my fry get sun light as i put their tank next to the window to grow algae so they always have something to eat & grow like i feed them steroids but they have no tube lighting. Quote Link to comment Share on other sites More sharing options...
Caryl Posted September 29, 2009 Report Share Posted September 29, 2009 I was thinking more along the lines of fish whose fry do not like the light for a while after they are hatched - like cardinals. I seem to remember reading that they prefer a blacked out tank. This is from the article on this site re breeding cardinal tetras... Another factor to be noted in this bio type is that cardinals are found only in dark and shaded waters away from sunlight and they have a distinct dislike of strong light. It then talks about blacking out the fry tank with polythene. Quote Link to comment Share on other sites More sharing options...
Nymox Posted September 29, 2009 Report Share Posted September 29, 2009 could be so caryl coz my corys usually spawn late at night or very early morning. It depends what lighting you use as to how closely it resembles the sun. There are many spectrums of light that come with each ray of sunlight, not just UV, also the heat factor, I ve used high end indoor lighting for my carnivorous plants. I dont know how much and what gets filtered out through the water itself, also bearing in mind most natural enviroments dont have clear glass sides, light only comes through the surface. White light from eco bulbs will penetrate the water, they dont supply heat how ever but I cant see that being a factor here. They give just enough to get seedlings raised in an incubator, but then a yellow light must be added to supply the heat. There are many species of animal that dont directly live in light how ever, but still depend on it. I think this is interesting. Quote Link to comment Share on other sites More sharing options...
Caryl Posted September 29, 2009 Report Share Posted September 29, 2009 One of our members bred albino corys. She didn't realise they were still in a tank left to its own devices. The water went very dark green. She went to empty it and found the fry. Quote Link to comment Share on other sites More sharing options...
Nymox Posted September 29, 2009 Report Share Posted September 29, 2009 haha I can imagine that, mine spawn alot but just eat the eggs as shes laying them, any left she'll eat them herself, When i put them in the smaller tank to give the rams some room to spawn, I've noticed some eggs dotted on the fake plant, still white though so most likely unfertilized, Im sure ill get albino corys soon though. I was reading that BBS for cory fry is a big no no, they cant take the salt. Rams look to be getthing ready for another try too Quote Link to comment Share on other sites More sharing options...
AquaVitamins Posted September 29, 2009 Author Report Share Posted September 29, 2009 Ok cool, sould should be fine with 2 hours of lighting a day Quote Link to comment Share on other sites More sharing options...
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