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[APD] RE: blackout/O2 etc
>Hello, I was thinking of doing a tank blackout (to help with a persistent
>greenspot/dust algae) while I was away on a 5 day trip and doing a good
>prune when I get back.
It will not help with these algae, especially green spot.
Try adding some PO4 regularly/upping the CO2/traces.
To get rid of green dust: Scrub off well without any current in the tank,
then do a large water change lightly vacuuming the substrate.
You can do a blackout following this if you want(It will not effect the
green spot) which may make this more effective.
I finally got some green dust to grow a couple of years ago and worked with
it. If you do repeated treatments as mentioned(no blackout), Diatom after
scrubbing, UV etc will all help.
>My worry though is the fish getting enough oxygen during the blackout as
>plants won't be making any. I'd say I have a med fish load. Any ideas?
>I'll probably use a towel on the top of the tank and leave 1/2 of the glass
>cover open but not sure if that allows enough air to circulate. I have a
>spray bar which I could raise to get heavy surface agitation.
Yes, that's all you'd need to do, and turn off the CO2.
I'd suggest a good scrub like I said above, then do this.
That will maximize your success.
Note: Gloss and other plants elongate(they do not grow) during blackouts.So
they may be lanky when you get back.
>Tank is 90 gal, heavily planted.
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