Prost,
Martin
Jackson, MS
Quoting Bruce Stallsmith <fundulus_at_hotmail.com>:
> OK, thanks for everyone's opinion to date. I knew that asking this general
> question would probably get more answers than responders...
>
> Martin raises a good point about light below. The lights in the hoods I have
>
> are indeed actinics, with each hood holding a pair of the following: Osram
> 36 W, 2900 lumen Daylight; and Power Compact 36 W, 460 nm Blue. with (I
> think?) more lumens. Like I said before, I've never fooled with this type of
>
> gear but I know there's always extensive debate on lights in various 'zines.
>
> Martin said he didn't think actinics would provide enough phytoreactive
> light. But I would think that a source of 460 nm light would be exactly
> right, since that's the range where blue shades into green, and I know that
> various aquatic photosynthetic pigments have reaction peaks in that range.
> Any opinions based on this more exact info?
>
> And I should have mentioned that the river environment I'm aiming at is for
> steady flow, say about 3 or 4 knots, rather than real current like, say, in
> the Tennessee which more typically has a 12 knot current locally. So the
> H.O.T. magnum gives me adequate flow for my purposes to replicate the area
> of Sipsey Fork I'm inspired by. Ultimately I'm more worried about
> biofiltration.
>
> --Bruce Stallsmith
> Huntsville, AL, US of A
>
> >From: Irate Mormon <archimedes_at_bayspringstel.net>
> >Reply-To: nanfa_at_aquaria.net
> >To: "nanfa_at_aquaria.net" <nanfa at aquaria.net>
> >Subject: Re: NANFA-- 135 gal. Freshwater Tank
> >Date: Sat, 31 Jan 2004 23:13:37 -0500
> >
> >If you are trying to recreate a river system, the H.O.T. will N.O.T. do it.
> >Like Casper said. If you want primarily a plant tank - well, OK then. I
> >don't
> >have much use for a sump myself - I use a fluidized sand bed for bio
> >filtration.
> > On my 110 gallon native tank I have an Ocean Clear canister filter
> >(provides
> >about 40 s.f. of mechanical filtration area) driven by a Little Giant pump
> >which
> >has an unloaded throughput of about 450 GPH at 4' of head. I have the
> >return
> >placed below the water surface (so as to retain CO2) and directed
> >lengthwise
> >along the back of the tank. I have a ball valve which splits the flow
> >between
> >the FB filter and the canister. If I need river-type current, I have a
> >supplemental power head/water pump which moves about 400 GPH, which I
> >picked up
> >on eBay for about $25 - can't remember the name offhand but it's a very
> >versatile unit, and moves a lot of water for cheap.
> >
> >Oh, the actinics (usually around 10,000K)won't be much help to your plants.
>
> > You
> >should replace 'em with lights which have more output in the phytoreactive
> >range.
> >
> >Prost,
> >
> >Martin
> >Jackson, MS
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/ For more information about NANFA, visit our web page, http://www.nanfa.org