o2 and phosphate are at LFS pet stores. Iron I've never seen at an LFS.
Online they cost about $10.00 each.


"BenignVanilla" wrote in message
...
"Sam Hopkins" wrote in message
.. .
o2, phosphate, and nitrate, and iron if you dose fert into the water
column.
snip

I haven't seen these test kits in any store. Are these more of 'fancy'
test
product, I'd need to get on-line?

BV.