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Re: [APD] Strange cyano like algae



Rex Grigg sells a very nice brass check valve that I use.  See http:// 
www.rexgrigg.com/sale.html.  I have been using it since early in the  
summer, with no problems at all.

Vaughn H.
On Dec 4, 2006, at 11:40 AM, Tomoko Schum wrote:

> Greetings from the sunny but chilly South.
>
> I am a bit puzzled about this algae that showed up in my
> tank recently.
>
> The algae coats the edges of the leaves and make the plants
> look dirty.  It is black and slimy like cyanobacteria, but
> it does not have any smell.  Up close it appears fuzzy like
> BBA but it comes off the leaves easily like it's some sort
> of detritus.  Curiously I have red slime algae in my salt
> water tank that coats the sand surface like cyanobacteria
> which also have a fuzzy appearance.
>
> I cleaned my Eheim and its pipes and did a 75% water change,
> but it does not go away.  While cleaning I noticed that my
> CO2 level is lower than my original setting.  It turned out
> that my new check valve is too strong and it is slowing my
> CO2 flow rate.  I increased the flow back up and added the
> fertilizers (according to Tom Barr's instructions as I have
> been doing for a few years now.)  It looks as though the
> algae is coming back.
>
> I am wondering if I should treat the tank with Maracyn or I
> should do a 4-day blackout.  Or should I just watch and see
> how the increased CO2 level helps the tank?
>
> Oh, one more thing.  Which check valve are you all using on
> your CO2 line lately?
>
> Tomoko
>
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