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Yet another beginner trying to beat BBA
- To: <Aquatic-Plants at actwin_com>
- Subject: Yet another beginner trying to beat BBA
- From: Jason Camara <camara at chemistry_ucsc.edu>
- Date: Sun, 22 Apr 2001 00:35:21 -0700
- In-Reply-To: <200104200748.DAA07689 at actwin_com>
- User-Agent: Microsoft-Outlook-Express-Macintosh-Edition/5.02.2022
Yet another beginner trying to beat BBA. I have a 6 gal System Six Eclipse
tank that I have tried to set up for plants. I set up the tank 2 months ago.
The substrate is gravel with Laterite. The lighting was initially the 8
watt T5 fluorescent that is standard in the hood. No CO2 initially. Water
kH 8-9 dkH
GH 15 dGH
76 78 F
Needless to say BBA appeared fairly quickly. I went looking for help and
landed here. I set up DIY CO2 and swapped out the lighting for a
CustomSeaLife CSL22 that has a 9 watt and a 13 watt compact fluorescent
bulbs (7100K). For a while looked as though I was winning, but things have
started going down hill once more. This is where Iım at now.
Water changes once a week ~50%
K there but not measured (added with the Fe)
pH 6.8 7.0
CO2 based on pH and kH ~25 38 ppm
NO3 < 5ppm
PO4 0.1 0.25 ppm
kH 8 dkH
GH 11 dGH
Light cycle is 1.5h 9w 9h 13w 1.5h 9w
Flora: started with 3 guppies, now have about 20 (most still pretty small),
4 amano shrimp (which I just found out wonıt touch BBA), lotsıo MTSıs
Fauna: Few different swords, Bacopa caroliniana, Cardamine lyrata,
Cryptocoryne wendtii, Cyperus helferi, Lilaeopsis brasiliensis, Hydrotyle
leucocephala, and a few others.
What I have noticed is that new growth is not touched by BBA. Older leaves
that have reached full growth start to accumulate BBA. The CO2 levels I
know are high, however the fish, shrimp and snails are doing fine. I have
an air stone that goes on after lights out. I would lower the CO2 but in
this small a tank with DIY itıs a little tricky to maintain.
So as I said it looked as though BBA had stalled and the plants were
winning. Then things switched and the BBA just grew like a shot. No change
in water chemistry, I check everything daily. Two nights ago I removed all
the plants and did a deep gravel cleaning. Cleared out as much BBA as
possible by hand and replanted. I did several water changes (easy with well
water no chlorine) and have had the NO3 down to 1 ppm for the last two
days. I also cut back on Fe in the water column. The last two days BBA has
definitely slowed, but so have the plants. With out the Fe and NO-3 I donıt
see nearly the pearling during the day that I used to see.
Anything obvious that I am missing? I havenıt started micro-nutrients yet,
but plan to soon. Iım an organic chemist so I have most of the things I
need around the lab, just havenıt put them together yet. Another plan I
have is to remove the guppies (take them back) and put in a couple of SAEıs.
I have this feeling like Iım missing something important, but canıt quite
figure out what is missing. Any help would be greatly appreciated.
Singaram Research Group
University of California
Santa Cruz, CA 95064
email: camara at chemistry_ucsc.edu