Every couple of years I just sort of forget about it and it gets a bit out of control.
Well, apparently, I set a record for ignoring it. I mean, the plants grow, it rained enough to keep it filled naturally, and everything seemed OK.
Until I noticed that even after heavy rains, it wasn't staying filled. So I refilled it with the garden hose. The next day it looked dry again. Oh damn, a leak!
So a few days ago, I decided to pull the individual potted plants out to find the leak.
Guess what? I couldn't remove the individual potted plants. They were intertwined. In fact, as I discovered, the entire interior of the pond was nothing BUT roots, and most of the plants were growing outside of the original pots!
I couldn't lift the mass of plants out the the pond. But I have something called a "Digger Knife". It is basically a dagger with a saw blade. I started cutting pots out of the root mass.
In 2 hours of hard work, I had 1/3 of the root mass removed and stopped for the day. My work rule is 30 minutes max and 15 minutes relaxing. I don't want to die stupidly. I go inside to cool down and drink Gatorade.
I also wanted to save as many of the plants as possible. Well, it really is amazing how many large containers you have around if you really search. I found 4 and filled them up with water. So as I cut one portion on plants loose, I stuck them in those until they were packed. But as long as they have water, they are fine.
The next day, having many plants in water in containers, I got a bit more brutal. I just kept cutting with the digger knife until I was down to about 1/3 the root mass. I weighed myself in the morning and later in the day. I lost 3 pounds in sweat. So I drank a lot more Gatorade, sat inside an hour and went back outside.
THIS TIME, I was able to lift the preformed pond up and over, spilling the remaining root mass onto the lawn. Whew, that was a great relief. I now had the preformed pond loose and could look for a hole to repair. And I couldn't find one. The best way to look for a hole in something is to hold it up to the sunlight. Nothing, nada, zip... So I set the preform on the lawn and filled it up halfway (because it seemed to be leaking lower than that).
The next morning, the water level was exactly the same! I was utterly baffled. So I scooped out the water and poured it on plants (avoiding wasting water) and considered the shaped hole in the ground. Well, it was never quite level, so I added some soil at the low end, and pounded in in removing the smallest bits of gravel.
So I put the pre-form back in place. And refilled it. It isn't "perfectly" level, but within 1/2" and that is good enough. It used to be a bit tilted toward the back, so the front always looked a little empty. Now the front always looks full. Better.
Now I have to wait to see if it leaks again. I put a stake at the spot where the water overflows. If it is below that in 2 days (accounting for evaporation), I will drain it and decide whether to line the inside with plastic, scrub the outside and inside and paint it (inside and out with a water sealant, or replace it.
I have enough problems with some parts of the yard as it is (wild blackberries, english ivy, and poison ivy showing up everywhere). I really didn't need this one. But it was a very specific problem and I sort of needed that.
Those other problems come next. I'm in activity-mode...