Re: How much light is too much light?

["gkadar" <gkadar@idirect.ca>]

I'm checking the postings through and I know this thread is a bit stale but
I'd just like to put my 2 cents in.

A couple of years ago I increased the lighting on my planted tank to 220
watts compact fluorescent.  This over a 120 gallon 24 inch deep tank.  The
effect it had was to cause the pH to fluctuate quite wildly over each 24
hour period.  The plants were growing so quickly that the KH was depleted
and the pH would go from 6.8 in the morning to 7.8 by mid afternoon.
Although this may seem to be problematic, in fact the apistos had a whale of
a time and successfully raised a brood.  I don't know what more sensitive
fish would do under the same circumstance.

I'm not sure what the highest pH reading could have been by the end of the
day when the lights went out though.  Once I saw how much fluctuation was
happening, I'd turn the lights off early until I was able to set up a CO2
system.  From what I've read there is some natural pH fluctuation in the
wild although exactly how much, I don't know.  So perhaps some is normal and
fish don't mind.

Gabriella Kadar
Toronto, Canada

-----Original Message-----
From: Szalies Jean-Marc <JeanMarc.Szalies@distri.be>
To: 'apisto@listbox.com' <apisto@listbox.com>
Date: Monday, January 08, 2001 2:45 AM
Subject: RE: How much light is too much light?


>As much as you want !
>Use ricia.
>
>> -----Original Message-----
>> From: Jason Sullivan [SMTP:jsull97@earthlink.net]
>>
>> I am trying to maintain several planted tanks ranging from heavily
planted
>> "show" tanks to a couple more lightly planted "breeder" tanks.  My best
>> success has come with higher lighting capabilities (2 to 4 watts per
>> gallon
>> for various depths).
>>
>> My concern is not stressing my rams (microgeophagus/papiliochromis
>> ramirezi).  For example, a power compact 55watt light over a 20High (new
>> setup with more sparse plant growth to date).  The plants will be in
>> heaven
>> but I don't want the rams unduly stressed.
>>
>> QUESTION:  What level of lighting have others found acceptable/stressful
>> for
>> rams?
>>
>> Thanks!
>> J Sullivan.
>>
>>
>
>
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