Slight side step to the original post. When I bought our place 25 years back, there were two prefab concrete tanks supplying the water to the home. Early on we had a strange awful smell in the water. Upon checking I found a dead frog floating therein and removed it. The problem to fix was the concrete lid was not well formed ot designed causing me to almost drop it into the tank. The lid shape was supposed to prevent such but it had only one grab/lift loop. also compost like dust/soil had formed (from droppings from a vanilla pod tree flowers, leaves & fruit) and worked its way into the crevasses between lid and tank making it difficult to remove.

Something had to be done (& removing the tree alone would not solve it but i should have done that in hind sight & not listened to squarks from she who must be obeyed). I found only one piece of gal pipe to suit (grab/lift loop was too small) but enabled me to lever the lid with some control to not drop the lot into the tank.

Here is the pic.

Attachment 34690

cheers: I'm back to culling for the big move.