Hello,
Our 4-year-old pond has developed a leak. A large hole in the liner was found and patched, but the pond continued to leak. I have now emptied the pond of the water, koi and gravel. I have found the other leak and will patch today. My question is regarding the gravel. The stones are smooth river stones approximately 1 centimeter in size. Is there a general rule about how much gravel should be at the bottom of this pond? The dimensions are 12 feet by 12 feet, 3 feet deep. The bottom of the pond is closer to 7 x 7'. The liner is EPDM. There is an in-pond pump leading to a pressurized biologic filter with UV light and then a waterfall. There is also an aerator. There are about 15 koi, some of them are monsters. All was well with the pond prior to the leak. The koi spent the night in an inflatable pool and are doing well this morning. Hope to have the leak fixed today and back in the pond by this evening. I was just looking for excuse not to shovel all of the gravel back into the pond. Thank you in advance for your help.
Our 4-year-old pond has developed a leak. A large hole in the liner was found and patched, but the pond continued to leak. I have now emptied the pond of the water, koi and gravel. I have found the other leak and will patch today. My question is regarding the gravel. The stones are smooth river stones approximately 1 centimeter in size. Is there a general rule about how much gravel should be at the bottom of this pond? The dimensions are 12 feet by 12 feet, 3 feet deep. The bottom of the pond is closer to 7 x 7'. The liner is EPDM. There is an in-pond pump leading to a pressurized biologic filter with UV light and then a waterfall. There is also an aerator. There are about 15 koi, some of them are monsters. All was well with the pond prior to the leak. The koi spent the night in an inflatable pool and are doing well this morning. Hope to have the leak fixed today and back in the pond by this evening. I was just looking for excuse not to shovel all of the gravel back into the pond. Thank you in advance for your help.