Help rebuilding indoor/outdoor pond
Help!! We have purchased a house that has an indoor outdoor concrete pond. There is a pond inside that is 20 inches deep and 3 feet in diameter. There is a 6 inch pipe through the footer of the house to an outside pond which is 21/2 feet deep and 5 feet in diameter.
A previous owner drained it and filled the outside one with dirt and old tiles. The indoor one was just a big hole that they used for firewood. We have emptied the outside one and would like to get it functional again.
There are numerous cracks on the outside pond and the concrete around the edge is breaking off.
We consulted a concrete guy who gave us an estimate of $2,500 to break out the old concrete down to where it is stable and rebuild it.
We consulted a landscaper who has done numerous ponds. He suggested closing it and putting in a planter inside and lining the outside with rubber liner for a water garden. He didn't give us an estimate. It seemed like he was too expensive to even go that far.
I have several questions. What is the best way to repair this? Is there flexible fittings available to seal the pipe (with the curve of the pond) so fish can go indoors or out? Do I need to heat the water? What type of maintaince would be required on a pond like this?