After developing a rather alarming leak in our pond we have moved the fish (koi etc) to a large paddling pool while we replace the liner. Now to decide whether to go with pvc - which we have just taken out, or try butyl/epalyn? We have heard various for's and against's for both, anyone out there have an opinion on which is best? To give a rough idea, our pond is a freeform shape (some corners) and is about 20'x 10'x 4'. Many thanks for any advice, Tracy
Hi. We decided to go with pvc liner and have constructed the pond as follows -
PVC Liner with a brick and concrete mortar joint inner. Basically, we have pvc lined the pond then on the upper shelf have put bricks and mortar on the inner side of the pond wall and backfilled between the liner and outerside soil. Vertical layers go Cement - liner - brick wall with mortar - water. Will the lime in the bricks and mortar affect the fish when we put them back, do we need to use something to help the ph or is there anything else you can recommend? We have only done chosen this method to reduce the risk of rats eating through the liner again and wasn't the way we had originally built the pond so want to make things more robust this time. Any advice will be much appreciated. Thanks, Tracy
I think I understand, but a picture would be better. If there is to be cement in direct contact with water, it must be sealed, as the lime can alter the ph. You can of course leave it for a few months filling and emptying but a sealer is quicker. The most popular non toxic sealer is called G4
Hi there, cement that has not yet cured (set and stopped reacting ) is deadly to fish, they die in agony they literally burn up like being in an acid bath! My mother-in-law lost all her fish when wet cement leaked into the pond after someone reset the edging stones. Seal it and leave at least one month before adding fish. The cement should be inert by then. I used to work in the concrete industry so in this case I do know what I'm talking about. You would have been better off leaving the liner over the bricks using a suitable underlay.
Sorry,here I go again- those sharp brick edges won't do your fish a great deal of good either esp. if you want koi in there, scrapes, lost scales and other damage will harbour infection as well as the initial injuries.