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Aug 21 at 18:47 comment added Logan R. Kearsley @Antares If you produce more oxygen at depth, in a region that is not already saturated, the extra oxygen will not rise to the surface--it will dissolve into the water and stay there, until you have produced enough to supersaturate the water. And saturation points increase with pressure, so the deep ocean is essentially never fully saturated, and you could produce quite a lot of additional oxygen before any of it starts to bubble out.
Aug 21 at 3:46 comment added Thunderhammer @Antares Seeing how they live in saltwater and saltwater is highly conductive, I chose to limit it to that. At least until they find a way to weaponize it. For now, the closest they'll come to weaponize it is when something tries to damage their gills and get a nasty shock when they're too close. Considering adding toxins to the gills to save them from having to use electrolysis too much.
Aug 21 at 1:00 comment added Antares @Thunderhammer: Do they have abilities like electric eels so they can use this as "weapon" against harmful humans? Or just for electrolysis purposes?
Aug 21 at 0:46 comment added Antares @Thunderhammer: Yes, awnings! Maybe this is the reason why they use those "metal plants" you wanted. The plants do not produce the oxygen, but their leaves keep it on the desired level (for longer). The oxygen comes either from the paved ground or (later) from the scientific improved geobatteries which for example pipe the oxygen so that it will rise close to the stems of those plants, The oxygen is then trapped below those "umbrellas" for longer until "breathed away".
Aug 21 at 0:41 comment added Antares @Thunderhammer: Sure, they can collect those nodules in tanks to "harvest" the oxygen and pipe them to certain factories/smiths/etc. The amount of oxygen that can be produced is open to debate, but there surely are explanations possible. Also I wanted to add, I like your idea with the emergency-electrolysis-gills. This makes it plausible why they are attracted to those nodules! They are susceptible to electrolysed/pure-oxygen and it resembles their biology. Best reason to be curious.
Aug 20 at 22:59 comment added Thunderhammer @Antares Perhaps some structures or pipes could be installed to direct them to important places like smithies or shops.
Aug 20 at 22:59 comment added Thunderhammer @Antares Oh no! I know you mean no harm! And I actually did have that exact idea of a dome with gloves where they could smith/weld/invent/etc. Science can only do so much in fiction but damn if it doesn’t inspire a lot. Maybe I could create some structures like some kind of domes or awnings that could hold the oxygen where people and animals could go under. At least temporarily. I didn’t even think of the oxygen just floating away in a straight line. I thought there could be like a continuous flow and spread out.
Aug 20 at 20:39 comment added Antares @LoganR.Kearsley: Maybe I use the term "saturation" wrong. I mean it as: The ocean is at max oxygen amount, because there is no more oxygen produced anywhere (the nodules, cyanobacteria, plants, wind mixing, etc. all are doing their thing already). If the nodules were made more potent then the extra oxygen would rise to the top (because gas), not stay or spread in the water. Would you agree? Or do you mean, the oxygen would stay in the water (at that depth?), because it is able to hold it?
Aug 20 at 20:12 comment added Logan R. Kearsley The ocean is absolutely not saturated! The surface layers may be close to saturation, but colder water holds more oxygen than hot water, so wherever you have water cooling off, not in contact with the surface, it will be unsaturated. And wherever you have animals consuming oxygen in the depths, it will not stay saturated. This is part of why global warming is dangerous--by warming the poles, we reduce the rate of downwelling that introduces cold, oxygen-rich water to the depths, turning them anoxic.
Aug 20 at 18:20 comment added Antares Also: If they can fashion smaller containers, this would surely help as well. Think about those laboratory glass boxes with two rubber gloves mounted to it. Inside there can be all sorts of atmospheric conditions. Maybe they just have many of those (with air ventilation system) to do their welding, soldering etc. inside of such localized "domes".
Aug 20 at 18:13 comment added Antares If you think their biology is able to handle the oxygen, one plausible way would be using those nodules to "pave" the ground of their cities, maybe use them as building blocks for houses (at least for an outside shell) etc. This way, the oxygen would rise up more or less "constantly". It is also always a way to handwave those things or better: find a story to cover the "implausibilities". If you want those plants, why not. For the plot this is surely fine. I don't want to discourage your story, just give you hints on points to think about. You have the power over all plot solutions!
Aug 20 at 15:31 comment added Thunderhammer I also wanted them to become “independent” from the land dwellers as part of their timeline hence why they would want to discover welding, smithing, maybe even electroplating (like the Moche) etc on their own. They actually DO, probably earlier on their tech tree, learn how to make sealed off containers but for different reasons. I was trying to avoid unnecessary info, but seems I might need to update my post after all.
Aug 20 at 13:19 comment added Thunderhammer Furthermore, I also knew it wouldn't do anything massive like affect the ENTIRE deep; but if we could have those "oases" I talked about, then that might still do a world of good. Perhaps the few times they interact with the upper levels or land dwellers, they could pick up on stuff or experiment?
Aug 20 at 13:06 comment added Thunderhammer (sigh) That’s what I feared. :( I figured they’d notice the water being “fresher” over the nodules and put two and two together there. I didn’t know if it would help to mention this, or if I should keep it, but this people may be able to perform bursts of their own electrolysis within nudibranch-like gills on their sides, to make emergency bursts of oxygen from time. They draw in water, shock it, and either release or keep the hydrogen. Thought they could make connections between themselves and the nodules. Is there a way to “fan” or spread the oxygen out like a fish tank oxygenator instead?
Aug 20 at 9:40 history edited Antares CC BY-SA 4.0
added 115 characters in body
Aug 20 at 8:50 history edited Antares CC BY-SA 4.0
Revised the geobattery 1.5-AA-battery aspect XD
Aug 20 at 8:42 history edited Antares CC BY-SA 4.0
Revised the geobattery 1.5-AA-battery aspect XD
Aug 20 at 8:17 history edited Antares CC BY-SA 4.0
H20 corrected
Aug 20 at 8:10 history edited Antares CC BY-SA 4.0
H20 corrected
Aug 20 at 7:58 history edited Antares CC BY-SA 4.0
brute force smelting
Aug 20 at 7:48 history answered Antares CC BY-SA 4.0