Autofill with float on water surface?

[KoiFan84]

I want to add an autofill to my pond. The structure and filtration set up that already exists is such that I would need the unit to lay outside of my raised formal pond.

Could the dechlorinating canister be laid on the ground inside some type of water proof box? Could I then have some type of float whose water tube goes up the wall and the float on the end sits on the surface?

Any ideas for an autofill set up like this that dechlorinates water in the process? The less noticeable the part on the pond shelf and on water surface the better. Thanks!

[BAVOTOI]

hope Autofill work... If me I just diy spend time with KOI. There love to see more than. Spend times with Autofill.

[BWG]

Many use the auto float valve type used on livestock water tanks such as Hudson. No levers and concealed protected parts that don't clog or corrode. Always put a valve on the supply line to limit flow to a very slow rate. If you ever have a carbon filter mishap the slow rate offers some level of protection. Time the flow with a bucket.

[aquaholic]

I use auto fill but as a constant trickle - low flow, low pressure from a dedicated water tap.. There is an overflow drain that removes waste water by displacement. Reducing the water pressure greatly simplifies all your plumbing, installation costs, technical issues and potential mess - risks should problems occur.

As the incoming water is slow, the drainage can be small if you need to retrofit but a larger drain is preferable if urgent or large volumes need removal.

Chlorine and chloramine is removed by a standard inline carbon filter housing 10 inches with another 5 micron sediment filter upstream. Slow flow means long dwell time so small filters can be used. The Chlorine removal isn't needed with slow constant feed volume in comparison to main water volume but the filters and replacement cartridges are cheap. I used to monitor Chlorine once a month with a swim pool test kit but after 5 years, moved to once a year testing for several years and now I replace cartridges on each of my even year birthdays.

So no float, no pump, no drainage cycle, nothing to do - very boring. Put your drippers/trickle above water for easy visual monitoring