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Re: To Filter or not, Surface scum, Yeast CO2 Stopped.

>Date: Tue, 17 Feb 1998 08:30:57 -0500
>From: gacasey at ibm_net
>Subject: To Filter or not
>Hi, This is a question I have been mulling over lately so I am hoping to
>get some input from the list. I have a 150G Plant tank athat, at
>present, is filtered with a wet\dry. The tank has CO2{auto}, 2 175wattMH
>lamps{pendants}. It is fairly heavily planted and at this time only has
>1 small fish, a hillstream loach. I don't ever plan to add too many more
>fish maybe a dozen or so cardinals and rummynose and possilbly a few
>corys. I would to know if removing my wet\dry bioballs will be good\bad
>for the tank? The water usually tests at ph6.9, kh2-4, gh 8-11 Phos .9
>on my last test. 0 amm 0 nit. Thanks any help at all would be greatly
>Later Gareth

Your tank doesn't need additional biofiltration.  From what I can tell, the
bioballs aren't hurting anything either.


>Date: Tue, 17 Feb 1998 08:02:02 -0600 (CST)
>From: Kin T Tam <tamx0004 at tc_umn.edu>
>Subject: Surface scum
>I posted in the past before.  I had no surface scum in my 150.  From what
>I see the UV filter does not help in removing the surface scum.  I also
>had a Emperor 400 and that was keeping the scum off the tank because of
>sunigiant water movement at the surface.  After removing that I've been
>getting surface scum.  The scum comes back very quickly.  It goes away
>after a large water change because of all the water movement at the
>surface.  But a day later a thin layer will start forming again.  I think
>the only way to deal with it is have a lot of water moving at the surface.

I found that surface scum was usually due to the food that I added to my
tanks.  When I reduced my fish load and feedings past a certain point, the
surface scum went away.


>Date: Tue, 17 Feb 1998 20:54:21 -0500
>From: "Erik Peterson" <erik2323 at voyager_net>
>Subject: Yeast CO2 Stopped.
>I recently set a up a yeast CO2 reactor for one of my planted tanks.  For
>about a day it produced bubbles at a steady rate (about one a minute).
>it just stopped making bubbles.  If I shake it or swish the water around a
>little it makes bubbles like crazy for about 3 seconds then stops again.
>What can I do to make it continuously make CO2?  I hope you can help.
>- -Erik

Please do not send HTML to the list.  It doesn't display well, and is a
pain to clean up and format a response to.

You didn't mention what recipe you used to set up your yeast generator.
The most common way is to use 2 cups of sugar, 1 teaspoon of yeast, 1
teaspoon of baking soda, and then fill your 2 liter bottle to within 3" of
the top with lukewarm tap water.  This recipe usually lasts from 3-4 weeks
with most municipal water supplies.  If you're using this recipe, then you
probably have at least one leak between your CO2 generator and your tank.  

David W. Webb           Texas Instruments
(972) 575-3443 (voice)  http://www.dallas.net/~dwebb
(214) 581-2380 (pager)  2145812380 at alphapage_airtouch.com