There are alternatives though, some people use automated pumps, and even automated water change systems. It's also possible to run many tanks connected to each other and hence only having to change the water in one spot. Another method that I have used my self is to have a spare tank above the rest filled with matured water, in a rack this can quite easily be transfered to lower tanks when doing waterchanges.
Our Danish inventor friend Rene Bannerskjold has come up with a brilliant yet simple DIY solution and was kind enough to send over these pictures.
This is probably what most of us do, it involves alot of carrying and is also time consuming:
To start of, Rene has modified the hose using a fine net so that no fry or smaller fish will be sucked out:
The water container is here replaced by a drain:
The drain is running out trough the back door, this is a very effectiv eand simple solution that most people can use and modify to their needs, fair play Rene!
I would also like to add that this "fish water" is a really good fertilizer for most plants. I always try to use it up either in the garden or for pots and am convinced that I have seen a difference in plant growth.
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