I preach the same, without CO2.. agitation and aeration brings CO2 into the water CO2.
From: Kirk Melton <triax at bellsouth_net> Subject: LFS vs APD wisdom
was in the store today and the assistant manager was telling a woman there who could not get plants to grow in her tank to buy an airpump and stone to put aerate the water, which would stimulate plant growth -- the asst.
Raj, vu2zap Bangalore, South India.