No Bubbles!!!

---------- Forwarded message ----------
Date: Tue, 10 Dec 1996 09:19:32 -0500
From: "K & A, P.A." <kapa at netrunner_net>
Reply-To: kapa at netrunner_net
To: Aquatic-Plants at ActWin_com
Subject: No Bubbles!!!

Dear collective, here's a query:

Fact pattern: 10 gallon tank; yeast CO2; 3 x 15 watt Flourescents;
heavily planted

pH= 6.8 -7.4, NO3= 0, PO4= .5 ppm, KH= 5.5 dH, O2= 7-14 ppm, Fe= .1 ppm

Fertilizer: Duplaplant, Duplaplant 24, Duplagan and Power Sand Substrate

Query: I once had happy plants, bubbling all day long.  Then one day, I
added 15 tetras and they bubbled no more.  Green algae (beard on anubias
and slime on filter outlet) appeared.

Any thoughts on possible causes?

My thoughts:  I suspect PO4 are too high.  My Seachem test kit states
that if they are too high it will give a false low reading.

Thanks in advance!

Art Giacosa