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Hircus

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Lepton

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  1. Hi all, This is my first post so please bear with me. I run closed recirculating fish tanks for my research, but have always struggled with maths and 'moving' equations around. Basically the scenario is this:\ I have a closed 2000 ltr system, but have no way of cooling the water. I have access to plenty of freshwater from a nearby creek which runs at outside ambient temperature. How do I work out how much colder creek water to add to the inside tank system to meet a specific temperature. I would like to generate myself a quick reference chart so I do not have to do constant calculations everyday. For example: 2000 ltr fish tank is at 20C. Creek outside is at 8C. How much creek water do I need to add to make the fish tank run at 15C? Bear in mind - I have to replace the 20C water with 8C - I cannot add more or the tank will overflow. How is the equation Q=mcT rewritten for this problem - or is there another equation? I will repeat the addition of cold water every few days as the temperature creeps back up again (as the pump adds heat), so will have to constantly make calculations depending on tank temp., and creek temp. Any help would be greatfully received. Thanks
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