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fertilization, brown film, and bulbs
> From: Mike Charlton asked:
> Subject: Starting up fertilization again
> The question is: how should I start? I have stopped injecting CO2 for
> the moment. Should I start it first, or should I start with the PMDD?
> In the past I have had problems with nitrate being limited. Should I
> get my nitrates up to 5 ppm first and then start adding the other
> fertilizers, or should I do it all at once? Or perhaps I should leave
> well enough alone for a few weeks (only, I'm starting to notice pelt
> algea reappearing on my swords).
Mike, do you own a test kit? A kh & ph test kit will let you know whether you need additional CO2.
If in the past you've had a problem being NO3 limited, probably you will again. Are the plants growing well right now?
What is your lighting like? Ever test for iron?
> From: MarsalaSix at aol_com asked:
> Subject: plants covered with brown film
> My plants tend to last for a few months before they are covered with a brown
> layer that is unappealing and can't be wiped off. I think it inhibits their
> photosynthesis, too, because they lose health, and I am forced to uproot
> them. It always happens gradually. I know it is most likely some sort of
> algae, but I have heard there is a non-algae type of brown film that can
> form in tanks.
I should add that it's a 29g tank.
> The tank top only has room for one
> standard flourescent so lighting is limited, it's a 20 watt "vitalight," on
> almost 12 hours a day.
Sounds like diatoms. Your lighting is pretty weak, look here first.
> From: Hoan Tran <hoanvt at operamail_com>
> Does anybody on the list have any experience with Coralife NutriGrow
No, but I'm not impressed with Coralife. IMO, most (if not all) bulbs sold by aquarium supply
companies are way overpriced for what you get. I'd recommend a 5000 k, full spectrum lamp
with as high a CRI as you can find. Most lighting supply houses should have something
that you'll find acceptable.