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RE: [APD] RE: increased light levels = more dosing.

In one of my previous posts I mentioned that I was getting this spot algae
and you suggested that I could stop dosing K2S04 , at least that was the way
I recalled it .Originally I stopped dosing P04 instead and the problem
persisted so I did a follow up post and you straightened me out on the fact
that you had never suggested to stop dosing P04. After I stopped adding
K2S04 the spot algae that was a devil to scrub off stopped. What is going on
now is somewhat frustrating and I was certainly worried when I added the
extra lights that I was going to have some trouble. I notice tonight lots of
hair type algae on the edges of the plants like crypts, val's etc. This
stuff easily rubs off so I guess that is the good news. As far as CO2 goes I
thought I was right in the ball park. The last time I checked I was putting
in about 60 bubbles per minute and with my Ph at 6.6 and KH at 80 PPM I
should be in the 30 PPM area which was where you suggested I should be. I
can certainly try adding the K2S04 back in and see how it goes. I was
worried that I was giving it too much nutrients which was contributing to
the green water and increased green algae on the glass. I can pretty much
clean algae off the glass twice a day. I'm willing to try any dosing method
and amounts. Do you feel I should go back and start over with the original
recommendation , up something or?. I appreciate the assistance. BTW I do
have what may be considered a good fish load in the tank with a Pleco about
6", 4 Clown loaches 2" to 4", 2 good size Angel fish and 3 good size
Rainbows. Perhaps phosphate is playing a role in this.


-----Original Message-----
From: aquatic-plants-bounces+rick703=mts_net at actwin.com
[mailto:aquatic-plants-bounces+rick703=mts_net at actwin.com]On Behalf Of
Thomas Barr
Sent: Thursday, May 13, 2004 4:11 PM
To: aquatic-plants at actwin_com
Subject: [APD] RE: increased light levels = more dosing.

Rick, everything you have said says not enough CO2 all the way around. It
might no longer be an issue but the things you've said point that direction
at the time.
You might have improved this at some point, but all the indications
suggested that was occurring.
I've had intense pearling at much less light than what you had prior. Like
as little as 1/2 that amount.
If you added that amount of nutrients with that amount of light with water
changes etc, the only variable that would cause much issue would be the
I'll assume you have fish and some waste from that source.

Why did you stop dosing K2SO4 and attributed this to spot algae? There's a
correlation between PO4 and CO2 and spot algae, this is why I believe it
was your CO2, you had PO4..............from dosing. Poor CO2 can also
trigger GW by slowing down NH4 uptake by plants or poor filtration/current

When you add more light, you will have faster uptake, but only up to a
point. Generally FL's/MH lighting does not get this high to reach that
point but can come close in some cases.

I have a 75 gal
It has a light fish load,
Good CO2(30ppm)

I add 3/4 teaspoon 3x a week
1/8thKH2PO4 3x a week
15-20mls Flourish 3-4x a week

I use 220(PC, 5000/8800K) watts but sometimes use 330 w but still get the
same good growth but faster.

Decrease in GH might be a factor of the water company's changes, but you
can add a bag of aragonite etc if you wish.

Tom Barr

Tom Barr

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