Re: [APD] Strange nutrient absorption problem

["Philippe Lemaire" <ph_lemaire at compaqnet.be>]

Too much K ?

Philippe

----- Original Message ----- 
From: "Kevin Sheller" <kevmo at arenafan_com>
To: <aquatic-plants at actwin_com>
Sent: Monday, March 08, 2004 2:58 AM
Subject: [APD] Strange nutrient absorption problem


> I'm having some problems. Here's some stats before we get to the problem...
> 
> 75 Gallon
> 1 year and 1 month old
> 192 watts of standard fluorescents (two 3-bulb T8 hoods - I haven't changed
> the bulbs yet)
> Medium-high fish load (12 large rainbows, 4 rosey barbs, standard algae
> crew)
> PH: 6.6 - 6.8 (canister CO2 -- haven't had to refill it yet)
> Nitrate: 17.6 ppm (I don't add any extra)
> Iron & Traces: TMG, 2-3 x per week
> Potassium: 1 teaspoon potassium sulfate, 2-3 times per week
> Phosphate: 1/8 teaspoon mono potassium phosphate 2-3 times per week
> Water changes: 40% once a week
> 
> Plants: lots of the clover groundcover stuff (not glossostigma, the
> slower-growing, dark green stuff) Madagascar lace, apontageton ulvacius
> (which isn't growing well without jobe's sticks) lots of dwarf sag, some
> crypts, rotala macrandra (another that needs jobe's sticks) rotala
> rotundifolia, anubias barteri, giant hygro (which has just stopped growing
> altogether - not pinhole leaves - just stopped growing.)
> 
> Problems: Plants don't seem to be absorbing the nitrate much. I don't have
> to add any, and it still seems to go up over time. Not as much pearling as I
> used to have. The plants don't do as well unless I supplement with jobe's
> sticks... Today I'm starting to get a bloom (bacteria or algae - not sure
> which yet). The plants need SOMETHING they aren't getting, but I can't
> figure out what.
> 
> Kevmo
> 
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