Leak in formed pond

Fiber glass once filled with water will have to be emptied and completely dried out in order to make a 'same' material patch. meaning, using more glass and resin to patch the hole(s). The area needs to be cut and roughed up to have the resin 'stick' to the old resin. This may require you to completely remove the 'pond' form just to get to the leak. (if the fish needs a temporary home then you might try the method I've described below.) If you can locate the exact leak spot and able to get it dried out then it may be possible to use water proof 100% silicone to patch the area. This does require a 24 hour dry/cure period. The clear stuff is the same used on glass aquariums so it should be okay to seal the leaks. Check with your pet store for advice. I don't know about 'FLEX-SEAL" products, but you might call them for advice before using it.

Depending on the shape and size of the pond you can (temporary) cover it with a contractor's plastic drop cloth (use at least 3.5 mil). I don't even use anything as permanent as fiberglass as the aquatic animals (carp, turtles, plants, etc.) tend to grow beyond the capacity of any 'fixed' pond that I've set up. I just use hollow concrete 8" x 8" x 16" tiles. (though 6" x 6" x 16" will work too) Lay out the shape you want and cover with 2 sheets of liner. 6 mil works the best but even a 3.5 mill will last over 2 years. Don't go over 3 bricks high as the water will cause a bulge and collapse the wall if it's too long. I keep the longest wall at 6 blocks max. Better to use several small rectangles than one really long one.
Aloha, ukeboy57

let it drain ---the water will level off at crack or leak

this fish finder is for use in water up to 600 feet deep , a pond is most likely shallow , 1-6 feet , this im sure was not what the designers had in mind when making this

so as impractical as this sounds the fix is to deepen pond , id say it wouldn't work to less than ten feet deep

now humming bird does make one that is for shallow water (3-10 feet) (has a special transducer ) but that's not model 197c

i dont think that you could do this

drain fish pond see what kind material the liner is made of and trouble shoot get a bulge pump pump the water into something that can hold it maybe like a kiddies swimming pool or something like a bigger yard swimming pool for fish and water wlmart sells swimming pools

i installed one of these in my grandpas pond and we all thought it would cook the fish but we were surprised when i didnt if you in doubt go with one thats not so high on the watts.

you should wait a week to make sure that everything is stable in pond and add your fish, avoid too many fish and overfeeding them. enjoy your fish pond, i love them.

Magnetic Drive: In a magnetic-drive pump, an electrical charge creates a magnetic field that causes the magnet on the impeller to rotate and pump water. Magnetic drive pumps are completely sealed and do not require lubrication. Because they do not contain oil, magnetic drive pumps are safer for ponds with fish as oil leaks do not occur. This type of pump does not generate high head heights, meaning it is unable to lift pond water vertically, which you might need to supply water to a fountain. Work best in cleaner environments with little or no debris Highly efficient, cost-effective operation Since they have no seals to wear out, they require little maintenance Occasionally clean the impeller and its chamber to ensure efficient operation Direct Drive: Direct-drive pumps have an enclosed motor that is powered by electricity, which turns the impeller shaft. Direct-drive pumps achieve significant head height so they tend to work well for fountains or waterfalls. Some models seal the motor in an oil-filled shell with seals around the cord and impeller shaft. These are risky to use if you have a pond stocked with fish as there is an ever-present danger of water contamination if a leak occurs. Many newer pumps, however, feature alternative lubrication over oil that is safe for fish. Look for oil-free models if you house fish or other aquatic life in your water garden. Typically more expensive to operate Ideal pump type for fountains or other accessories Pushes water rather than pulling it Not easily repaired by the user