If you want to moan and whine about adding too much/loads, excess amounts of anything, moan and whine about adding too much lighting................
Or go non CO2.............the Dutch have many old contest exmapkles of low light very well scaped non CO2 tanks............
So should folks advocate no CO2 as adding "pollution" or dumping lethal gas in as fertilizer?
Why is it PO4?
PO4 does no harm to fish or plants.
Neither does NO3 over a huge range.
CO2 is more toxic than either..............but no one questions adding that currrrrrrrrrrrrrrrrrrrrriously...........
I wonder why
Regards,
Tom Barr