Need help with Concrete pond.

[The Backlash Cometh]

Okay, it's tiny. It's just big enough to hold a couple of pots to grow waterplants. I need to know what kind of concrete is waterproof? I will also allow guppies to swim freely in the area (they eat mosquito larvae) so I don't want to use concrete with lime. I've used hydraulic cement before, but Ace's brand and Waterplug will probably be too expensive for this job. I have, however, seen a hydraulic patch at Home Depot and Lowes which looks affordable if it's the same thing? What do you all suggest?

[Whoa_Nelly]

1. Take a look at this info site

http://www.texaskoi.com/Articles/pond_building_101-%20Part%202.htm

And another site:
http://www.tortoise.org/general/pondmak.html

[The Backlash Cometh]

2. Thanks!

It actually looks like more than I'll need since my pond is tiny by comparision, but I'll read it through and see what I can dig out.

[trotsky]

3. You could use an epoxy paint to seal the concrete.

That's what's done with a lot of swimming pools.