Main system

I should have mentioned in the earlier post that I have got the heaters running in the 4000 litre system in the big shed and the water has come up to about 25 degrees. This is costing about 10 Kwhs of electricity as expected but we have lots of spare and so it doesn't really cost anything extra. Clearly that is a nonsense as the system upgrade cost a bomb but I wanted to upgrade our power anyway and I got a 50% government grant to do so. Still nice to be able to do this sort of thing on solar power.
At this temp the fish are feeding like crazy so I will have to bit the bullet soon and try and catch some for eating.
My duckweed pond is also going very well. Lemna this time and not azolla. The fish eat about a cupful each night. I don't ever see them eating it as they are too timid but is it gone in the morning.