Hi Jan, I sent a PM to you before, but never heard back, so I'm guessing your other situation worked out.
And on to the update.
We are sort of finally into winter here, although with frequent intermissions of 70+ degree weather amid 20 degree nights and 40+ days. I'm finally moving forward on the biofilter redesign for the large liner pond which is still somewhat green. The few gold fish I put in have turned into a massive bio load on the system and I can only hope the koi are safe and sound on the bottom since the goldfish are mostly taking over the top visible areas of the pond.
The good news is that the top biofilter is well on it's way to completion, and with a little more work I may be able to get all the fresh rock flushed out and start to use it intermittently. Since the pump is in the bottom filter under water I can actually run it periodically through the winter, and at night the water just siphons back down leaving the pipe empty so there's no danger of freezing
The new biofilter is also a good deal deeper than the previous iteration, but with the second pond added into the mix it still is only a wild guess that it might be adequate for the extra volume of water. Enlarging the skimmer/biofilter at the level of the old pond and making it a little larger/ more efficient, as well, is next on the upgrade and of course as vegetation gets established in the two beds they will become even more efficient at cleaning the water.
One of the challenges I face is that without an unlimited supply of water from a well I have to recycle repurpose every drop as much as possible. The newly established feed from my house roof surface should help keep the pond levels better and give a little more leeway. But for the time being I can only hope that it rains a little more *not too much I hope)
Meanwhile the butterfly koi from last winter are back inside after a lot of various challenges in their summer outside mostly from numerous losses from filter and aeration failures associated with hasty improvisations and cheap equipment.
I'm not quite sure what I was thinking when I started the koi project except that it would be a source of many new edges and different resources and somewhat a fun thing to try. My conclusions here in the middle of these projects are that unless you're running a mud pond of a good size be prepared to pay attention. These things may sustain themselves for quite a while and go wild, but the smaller the pond the more dependent it is on constant observation and fiddling around keeping systems working.
That's not to say that better automated controls and warning sensors couldn't make them less labor intensive, but the knowledge required and techniques needed in setting up the smaller systems is pretty intense, and be prepared to lose more than a few fish. And if goldfish are added to the mix they will likely take over and make your work even more intense. Sure, if you have plenty of grid power and a deep water well things get much easier. Also, I'm confident that over time even these creations with solar power and rain water will be more easily managed .
As far as side effects of this experiment, a rich source of fish fertilizer builds up inside the biofilter and more regular pumping of it next summer should both improve my gardens and the efficiency of the biofilter. The koi are a bit expensive to start with, but like most growing systems the payback can be quite good and koi are about as prolific as goldfish, so be sure to have a market ready if you are growing them for profit.
As far as other projects here, I finally set up the trial run of the evacuated tube solar water heater. Yes, black poly pipe gave good results, but this is much more efficient and a lighter weight on the roof. Trying to manage a couple hundred feet of 3/4" black pipe into a good collector is not an easy task for a single person and after moving the frame and glass doors that covered the unit several times it seemed to be time for a change.
Initial thoughts are that these tubes are giving great results-and can be used with relatively little extra equipment. They take up about the same area (6'x6') as the black poly setup but with less heat loss and a lot easier setup. Aside from the tubes themselves, the rest of the system can be pretty inexpensive. circulation 12v pumps can be found for around 20$ and plumbing directly into the house water system can directly provide domestic hot water and some radiant floor heat as well.
Of course this assumes constant hands on and right now they are actually not being used because of the possibility of freezing. One challenge will be to manage excess heat in summer. These tubes can easily overwhelm a storage tank, although thinking about it, maybe a hot tub might be a better use of that resource.:-).
In the future it will be possible to set up a separate antifreeze loop with heat exchanger and thermostats, the whole nine yards, but for now I'm calling this a success and worthwhile investment.
As far as gardens, there's lots of kale growing right now. but little else. Once again had to dig up banana plants from the space next to the house. They were fun and beautiful and all that but became an invasive species. Although to be fair, like most invasives they do create good soil. The original purpose of the bananas was to shade the south glass while waiting for the grapes to get established, but now with the grapes about ready to produce in this area the banana plants have to go.
Anyway, I did get some good results in the biofilter growing horsetail, but the wasabia japonica evidently needs more shade, so I haven't written it off, but it will likely be a couple years before I can figure it all out.
Misc hot peppers, a couple tomatoes, garlic, sweet potatoes blueberries, grapes, misc greens. I see the million calorie challenge here at Permies, and after playing with sweet potatoes for a few years may finally have a really good crop next year. I continue to play with them and even brought in a young vine into the greenhouse and wonder of wonders it is still alive. It's likely going to be more trouble than it's worth but figure it's good to get to know the plant if i plan for it to become a mainstay in my diet. The crop this year was only about 20 pounds.
Of course one of the main ongoing projects is the creation of soil and new garden spaces, and that is going great, new garden spaces faster than I can get them fenced in.
Anyway, I'll likely get around to updating my website sometime when it's cold or wet a few days in a row
webpage
Keep having fun.