Torrey Posted January 8, 2022 Share Posted January 8, 2022 It would make sense for guppies to need light on 2 fronts: Like @Guppysnail said above, to promote lots of swimming activity so those muscles keep the fish [and spine] active, strong, and straight. Second reason that I could see would be due to a generalization that may have missed the science: UVA & UVB light is a necessary part of making vit D3, which is needed to best utilize calcium. I am not saying that this is the case in fish, as I have not read any peer-reviewed research on the issue... for fish. We absolutely know that vit K2 is necessary for humans to generate and utilze D3, which is a necessary component for calcium absorption and utilization for healthy bones. So from a logic standpoint, if people noticed guppies grown in outdoor tubs with strong, partial sun never develop crooked/malformed spines, yet didn't understand the UV/D3/ calcium component, it would be logical to make the assumption livebearers need strong light. Does not make the statement true, necessarily. I absolutely know low calcium levels in the water will lead to deformed spines in livebearers. Again, I don't have any peer-reviewed research to validate either piece of logic. It may not have been tested yet, don't know 🤷♂️ 1 Link to comment Share on other sites More sharing options...
Guppy Guy Posted January 8, 2022 Share Posted January 8, 2022 (edited) On 1/7/2022 at 8:08 PM, Cinnebuns said: @Guppy Guy @Taco Playz another random question. I was told yesterday that fry need a decent amount of light to prevent crooked spines. That seems odd to me. Is that true? If so I will need to take some different steps if they go in the 5 gallon because the lights are above the hood not under it. That is a myth. Crooked spines are usually a result of bad genetics, not light. I haven’t tested this, but I would think that the fry prefer less light so they feel safer and not as exposed. Note that the genetics only do that after the guppies have been inbred for a few generations. If you only inbreed a few times, or better yet, keep the stock fresh, you shouldn’t have any problems. Edited January 8, 2022 by Guppy Guy Link to comment Share on other sites More sharing options...
lefty o Posted January 8, 2022 Share Posted January 8, 2022 genetics, and lack of minerals lead to crooked spines. Link to comment Share on other sites More sharing options...
Ashlyn Posted January 12, 2022 Share Posted January 12, 2022 If you can get some duckweed or something like that the guppy fry also like that. Link to comment Share on other sites More sharing options...
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