Hi, I have some questions about a pond I'm going to build. 1. Is the MacCourt 125-Gallon High Density Polyethylene Pond Liner at Lowes better than the Total Pond 7 ft. x 10 ft. Pond Liner at Home Depot? 2. The pond is going to be around 100 gallons or more whats the best filter for a pond. And how could I make a canister filter work on a pond? 3. My fish choice is sail fin molly, swordtails, guppies, comet goldfish or fancy goldfish. Which would be better in a pond around 80oF at times, but I want something colorful. And I would like to keep a few bristle nosed plecos in the pond would these be okay? 4. Would keeping mystery snails in a outside pond be bad? Could they get loose into another pond? There is another pond close by... 5. If I got goldfish how many could I keep in a 100+ pond. 6. Waterfall kits. I can't find any information on making a nice looking waterfall for the pond. I will be using the dug up soil to make the waterfall higher and then use stones to cover most of the soil thats "holding" the waterfall. After mostly covering it with stone, plant some small ground cover plants or vines. Would this effect the waterfall in any way? 7. I'm going to plant large plants on the southeast side for shade, will this help with algae problems? I would like a little bit of the pond to get some light, so I can plant high light aquatic plants there. 8. Aquatic plants for the pond, low light and high light any suggestions? I already was planning to get waterlilies and duckweed for added shade. 9. Will any of the fish listed previously eat my plants? Thanks for any answers!