So planning my shark tank I've started researching small coldwater sharks as well, such as pyjama or swell sharks. They would then be grouped coldwater larger fish like flounder, rock fish, etc. this sounds like a very fun and more unique tank, and a bonus is my basement is generally high 60s summer and low 60s winter, so cooling to 60f would be easier than heating to 78f I'm thinking (and I've thought about geothermal for my house anyhow, so could plumb it to both and get basically free chilling).
My question is about nitrate removal. From what I read the bacteria is much much slower and relying on live rock or sand to complete the nitrogen cycle is just not viable. I found a few examples where people control it like a freshwater tank - 50% water changes. That's fine on a 30 gallon tank, that's a lot of salt on a shark tank.
So how is nitrate controlled on large coldwater marine tanks? I've seen set ups at zoos, I doubt they do massive water changes.
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My question is about nitrate removal. From what I read the bacteria is much much slower and relying on live rock or sand to complete the nitrogen cycle is just not viable. I found a few examples where people control it like a freshwater tank - 50% water changes. That's fine on a 30 gallon tank, that's a lot of salt on a shark tank.
So how is nitrate controlled on large coldwater marine tanks? I've seen set ups at zoos, I doubt they do massive water changes.
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