So I have a black liner and when I first put the water in it it looked like a bottomless pit. Was cool, but not the beautify tropical lagoon I was hoping for. Now that some algae has formed on the sides and bottom the water looks really green even though it's not the water, it's the walls and bottom. You can see the rocks I have on the bottom of the liner holding the flaps down, you can see all of the junk in my filter buckets, and most importantly you can see the fish no matter where they are in the pond, but the whole thing looks a bit on the stagnant side because of this. It's not a huge deal, but I thought I'd ask is this just they way it will be? I'm certainly not going to scrub the walls of the pond or anything, but my 200 gallon goldfish pond has algae everywhere too but that pond appears to be crystal clear.