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Gilbert 09-11-2009 02:48 AM

Need help with 10 gallon cory tank.
So at the moment I have 10 corydora's in a 10 gallon tank. I have the half marble like stones on the bottom but am thinking of changing it to sand. The only problem is my filter(bio wheel) goes all the way to the bottom of my tank and I know that's bad for sand. I'm wondering if anyone can suggest a new filter and any recommendations for sand? Also Is 10 gallons too small for 10 cory's?

1077 09-11-2009 03:38 AM

Yes ten gal is too small for ten corydoras. Corys are sensitive to warm temps and nitrAtes much above 20. You will need to change water often enough to keep the NitrAtes at 20 or below according to test kit. Twice weekly water changes of three gal will buy you enough time to find a twenty gal long tank or larger. Would also help to add an airstone to the tank. perhaps the lift tube that pulls the water up into the filter could be shortned by cutting off a section with hacksaw? If not I would get a new filter rated for twenty gal tank and run it along with the current filter so that when you get the larger tank, you will already have a filter containing beneficial bacteria to place on the larger tank thus,making it safe to add half of the corys to the new tank immediately and the remainder of the corys after another week or two after introducing the first five. Corys with the exception of Sterbai Corydoras don't do well in the long term in temps much above 76 degrees F.

Gilbert 09-11-2009 06:11 PM

Well today I bought a 20 gallon long tank, 50 lbs of play sand, a new betta!!!! and a some more silk plants. I soaked the sand for an hour(every 15 min I shifted the sand) and put it in the tank with the water. It's sitting now but how long does it take to settle? And should it be so murky?

Rohland 09-11-2009 06:24 PM

Mine was really murky the first time. There is a difference between murky and cloudy. I drained all the water our. took the sand out washed it again for another hour. Then filled the tank with clean water and slowly placed the sand in using a small container. All the sand settled right away, you may have to do that! It worked better than putting the sand in then the water over top

Gilbert 09-11-2009 06:32 PM

hmmmm I'll go try it lol


Gilbert 09-11-2009 07:35 PM

well I've washed the sand 3 times again and it's still cloudy/murky =/

Gilbert 09-12-2009 12:32 AM

3 Attachment(s)
Well I cleaned the sand a total of 11 times today and its still murky :-( Am I cleaning it wrong? (I soak it in a huge bowl and shift it around every 15 min, empty the water out after about an hour and then do it all over again) Is it too murky to put the corydora's back in?

Rohland 09-12-2009 01:07 AM

This is how i cleaned my sand.
It was all in one bucket.
Filled it with water while stirring... dumped it out. The repeat. (I dont know how many times)

Then I decided to shove the hose all the way to the bottom of the bucket and stir with it.. sometimes dumping it out sometimes not. I think in total 2 hours of washing it took.

Mine was playsand from home depot.

Gilbert 09-12-2009 01:25 AM

That's where I got my sand. I guess I'm just not good at cleaning sand? lol Thanks

Rohland 09-12-2009 01:34 AM

It takes a really long time! I thought it was long enough the first time and put it in and it was still murky. So i took it all out and washed it again. And knew I didnt want to have to do it again if it was not clean so I really took my time the second time.

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