Hi all,
If you have a large plant load, and dose at low levels you can use any terrestrial fertiliser.I've never had any problems with ammonia toxicity with any of the fertilisers I've used, but I I have very weedy tanks, and I dose all my tanks much more leanly than you would for EI, so I get much slower growth.
The Ureic part doesn't sound good!?
A fertiliser containing urea (CO(NH2)2) would actually be better than one containing NH3, as the urea has to be biologically converted to NH3 by micro-organisms (with the urease enzyme), and urea is less toxic than ammonia.
Don't know about Pentoxide
Just means that the phosphorus (P) content is expressed as P2O5, which means it is about 2% P. K is expressed as the oxide as well, so there is hardly any of that either, about 1% K. So BabyBio probably works out as x100 as expensive as a proper fertiliser.
The feed I've got at the moment is "Gardenline Citrus feed 20:20:20" remaindered from Wilkinsons, (P and K as oxides, so 20:8.8:16.6 as N
:K) + traces (N as 5NH3:5NO3:15urea). This works OK, but I need to add some Mg as well. "Epsom Salts" are cheap so this isn't much of a problem.
cheers Darrel