Do concrete ponds normally hold water? Discovered in my backyard filled with dirt! Should I seal it w something?
Walter Reeves on Jul 08, 2012You can experiment with concrete sealers but the easiest solution would be to line it with rubber or plastic pond linerHelpful Reply
Woodbridge Environmental Tiptophouse.com on Jul 09, 2012that is a rare find. Are you sure the cement was forming a pond? Or was there something else that could have been buried there? But a rubber liner would work fine or paint with water proofing paint if no cracks are seen.Helpful Reply
Aquascape Inc. on Jul 09, 2012Hi Jennifer! Concrete has been used to make ponds, but I wouldn't recommend it. Concrete cracks, and when it does, the pond will leak. Even if you put a liner over the concrete, you're still taking a risk. Groundwater can seep up from the bottom through the concrete where there's a crack, and then you'll have water between the concrete and the liner. This results in the trapped water pushing up on the liner and causing a whole host of problems for your pond. Your best bet is to remove the concrete and start fresh with underlayment and then an EPDM liner on top of that (the underlayment keeps rocks from tearing through the liner). It's best to do your pond the right way so that you'll spend more time enjoying your pond and less time maintaining it. The size you mention is fine for fish, just make sure the pond is at least 24" deep so they can hibernate at the bottom over the winter. You'll simply need to keep a hole in the ice during the winter season for exchange of gasses. If it helps, here's a link to a web page with photos showing a 20-step process for building a low-maintenance, ecosystem pond: http://www.aquascapeinc.com/20steps.Helpful Reply
Jennifer on Sep 11, 2012I will post pictures soon. It's still filled with dirt... Thank you Aquascape for the info! :) I'm going to attempt to recycle/reuse first. Even if I have to have a 'plant pond' :) . I WILL have a water feature somewhere, though!! @ Woodbridge, geez, I hope I don't find anything scary....Pretty sure it was meant to be a pond, it's pear shaped, and has about a 5-6" thick concrete shell with rocks around the top. It's approx. 30" at the very smallest, and 4-5' at the thickest.Helpful Reply
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