Admin
Admin
Posts : 2330
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Join date : 2007-07-25
Age : 62
Location : Cape Town
 |  Subject: Biofilter Mon Nov 16, 2009 1:04 pm | |
| Posted on behalf of Eddie Reynders:
I have a gravity bio-filter for koi fish. My question is at what level must the brushes (filter) be situated regarding the outlet of the filter , above or below the outlet?.
Is a UV light really necessary? |
|
Admin
Admin
Posts : 2330
Reputation : 46
Join date : 2007-07-25
Age : 62
Location : Cape Town
| | Subject: Re: Biofilter Mon Nov 16, 2009 3:36 pm | |
| - Admin wrote:
- Posted on behalf of Eddie Reynders:
I have a gravity bio-filter for koi fish. My question is at what level must the brushes (filter) be situated regarding the outlet of the filter , above or below the outlet?.
Is a UV light really necessary? It depends on the type of filter. There are so many on the market. Upflow/Downflow etc. On your UV question, I believe in a UV for the fisrt year at least. Without, you will battle with green water. |
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