Fish love inverted aquariums in ponds!
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Joshaeus
Water hawthorn, Aponogeton Distachyos
Cool! I guess the fish like it. How big is your pond, by the way? That looks like a lot of goldfish in a relatively small pond. (PS...welcome to the forum 
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j.w
I Love my Goldies
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Very cool. Can you explain how that works? Is the aquarium upside down and the fish in your pond can swim up into it? If so, how the heck does the water stay in there? Water seeks it's own level. Is the aquarium floating or sitting on the bottom of the pond? I can see some PVC pipes. Does the lack of air in the aquarium create a suction keeping the water in there?
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You got it - generally I've seen people put a hose up there and either suck the air out with their mouth or use a pump to pull the air out. As you remove the air, the water will fill the tank.
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That is really cool!
Welcome to the forum. Looks cool but its long-term usefulness is doubtful. It will overheat in the summer and advertise to any passing wildlife, "Hey, look what's in here for you!" Probably get algae covered too. Not to mention with that many fish in there, the water will quickly become deprived of oxygen and foul unless there is some sort of water exchange going on that I can't see.
Those are fun. There are some folk doing really tall ones out there. Fun to watch the fish go exploring.
It's a 100 gallon hard preform. To the left is their new home that will be at least twice as big once I finish it. Thanks.Cool! I guess the fish like it. How big is your pond, by the way? That looks like a lot of goldfish in a relatively small pond. (PS...welcome to the forum
Just built a quick stand outta pvc, set the tank on it upside down, used a shop-vac to suck out the air and it fills up with water...physics i guess. The fish enter from the bottom...which is the top of the tank and just swim upwards. The pvc stand sits on the bottom.
Yeah I've already cleaned the glass once. Took about 3 winter weeks to get covered in green. I know summer will be worse. I have two air stones on either side of it and my filters pump sits near the entrance to exchange water a bit. The plant inside seems to be letting off some O2 also. Thanks. The pond gets about 3 hrs of direct light a day so hopefully it won't get too hot. Will keep eye on temp as things heat up.
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Nice work clever how relatively simple something like this is to set up
clever how relatively simple something like this is to set upLooks very cool! Just wondered about what to put it on in my deep 1.5m pond-bricks/garage shelves. How do you secure it so doesn’t fall over in windy weather?