Aerial View Water Change

  • We are currently upgrading MFK. thanks! -neo
jaws7777 said:
I think the sand bed would have to be pretty deep to support anerobic bb
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I killed a tank worth of fish with a 20% water change in a deep-bed sand tank.... sand was 3-4" deep... no other ill effects from the same water in 4 other tanks that got WC's at the same time.

I do big water changes in our fish room... 40-80% every 1-3 weeks... basically as often/much as I need to in order to keep up with Bichir Girl's (over:eek:) feeding
 
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Grinch said:
I killed a tank worth of fish with a water change in a deep-bed sand tank.... sand was 3-4" deep.

I do big water changes in our fish room... 40-80% every 1-3 weeks... basically as often/much as I need to in order to keep up with Bichir Girl's (over:eek:) feeding
Click to expand...
Wow thats sucks, i only keep a couple of inches of sand so 4 inches seems deep.
 
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jaws7777 said:
Wow thats sucks, i only keep a couple of inches of sand so 4 inches seems deep.
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Bought a bag of sand... only wanted one tank with sand... didn't have room for 1/2 a bag of sand lying around and didn't want to throw it out, so into the tank it went.

On the third WC (about 45 days after setup) I vac'd the sand to the bottom in a couple of spots, filled the tank back up, and made a sandwich. In the time it took to eat the sandwich the tank crashed, all fish dead. I thought I'd be OK because the fish were diggers... nope.
 
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Grinch said:
Bought a bag of sand... only wanted one tank with sand... didn't have room for 1/2 a bag of sand lying around and didn't want to throw it out, so into the tank it went.

On the third WC (about 45 days after setup) I vac'd the sand to the bottom in a couple of spots, filled the tank back up, and made a sandwich. In the time it took to eat the sandwich the tank crashed, all fish dead. I thought I'd be OK because the fish were diggers... nope.
Click to expand...

At one point i was thinking of setting up a deep sand bed in the sump but heard similar stories. Come to think of it there are spots on my tanl where the sand is easily 3 inches due to the polys stirring it and it being a heavier sand. Not liking this
 
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Good aerial footage! I agree on the large volume WC. I started doing 75% weekly WC several years ago and swear by it.
At one point there was a thread that showed the effectiveness of weekly large volume WC vs multiple smaller volume WC. The less frequent large volume was far more effective at reducing nitrates.
 
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As long as the sand is stirred up atleast once a week then no need to worry. Most polys will dig up or stir up so not much to worry. Some fish keepers believe and some don't. But it's plausible in a 2.5 inch sand bed.
 
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