18 Tarpons in a 500g Square Tank

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Do you have a test kit? I'd like to see what his water parameters are.
Yes. I never thought about that. I'll test his water params next time I go there.

With pretty reasonably/regular rain this would work- 500G is a lot of water and it sounds like it's catching from the roof. How much does it rain in Guam? Seasonal?
Tarpon (well, at least Caribbean version) are obligate air-breathers, so no matter what the O2 levels in the water they're groovy. Tarpon are also incredibly tough- quite comfortable in some pretty vile and/or toasty water. Their scales are heavy and their skin slime is thick, viscous.... and stinks- you can't wash it off your hands without serious effort. Physically and chemically armoured against half-assed husbandry ;)
Weather here is very unpredictable. I'd say it rains here 25% of the time. Never a week goes by without a drop of rain.

lol half-assed husbandry :D
Yeah. Nice quote right?
 
Yep they are air breathers so technically he doesn't even need that air bubbler other then for water movement. What is the dimensions of the tank? it doesn't even look like 500g.
5' L x 4' Wx 4' H
 
5' L x 4' Wx 4' H

Very interesting how he doesn't need a filter for them to live. Very cool too.

5' L x 4' W x 4' H is 600g according to MFK's calculator btw
 
Sounds like my kinda fish keeping, and tarpon aren't fish that need a lot. But to be honest if he's not cleaning that tank at least twice a week idk how those fish are still alive.
 
Seems like a tank full of giant beta fish. I'm sure if it rains about 25% of the time and he has hoses and such running to the tank thats a pretty large WC each week. Enough to keep tough fish alive
 
There's no filter in lake, river, or ocean... That's how fish live! :)
No there isn't but the big secret is that these bodies of water you mentioned are not enclosed in a box.
 
I dunno why, but there's something different that happens when fish are outside. I put a tank on my back porch every summer without filtration or aeration, and have kept a wide variety of fish and invertebrates there. I can remember going over a month without water changes (only topoffs) and don't think I've ever lost a fish out there.

Inside the house is a different story... ;)
 
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