Lilyann - is there a particular terrestrial based plant fertilizer that is safe for fish?
Matter of fact, Jan, yes, Osmocote is safe when properly added to aquarium in levels adequate to plant mass and monitored through water testing to ensure nitrate levels. Many hobbyists in other parts of the world use DIY fertiliuzers -- its ridiculous to believe that in all cases a terrestrial fertilizer will be detrimental to the health of fish. All fertilizers containing nitrogen have the capacity to harm fish if not properly administered in context to the aquarium ( plant mass, aquarium size, lighting, fish load, etc...). Its the responsibility of the aquarist to do due diligence in whatever method they choose.
Happy the "science" is obvious to you why terrestrial fertilizers like Osmocote shouldnt be used for aquarium plants in presence of fish- go explain your basic premises to those who successfully use them in the presence of fish all over the world. Its only in the US and wealthy European countries that "designer" bottles of aquarium ferts sound like the only idea around that makes up "good science". Typical "first world" belief system that is motivated by consumerism- not "good science". I would recommend you spend some time on an international plant forum and explain to them that they need to buy your designer bottle of plant food and give up their terrestrial fertilizers because its "good science" and harmful to fish.
Is this an adult forum? Can we all handle some debate or would we rather have a safe space to confirm our long-held belief systems without question. Buck up-- explaining your thought processes and challenging others to explain theirs is not "fighting". When did we become so fragile and unable to handle the exchange ( and yes, the confrontation) of ideas? The best way to help someone is to allow them to place ideas next to each other. If you think your ideas are the only ones out there that deserve to be heard ( and not questioned) then maybe you need to stick to blogs.
I agree wholeheartedly-- self-education ( interacting on forums, in books, academic journals, at aquatic societies with other members) that continues throughout life is the best way to learn anything. The problem is, many believe that thoughts that are "in conflict" are bad.This is a phenomenon of online forums- and one of the biggest reasons they are dying on the vine. The philosophy is: A new person to the hobby should never see ideas in "conflict" because they will confuse and upset them. Rubbish! Intellectual stimulation and learning starts at the moment when ideas appear in conflict, not when they are continuous. Its not the job of a forum to indoctrinate new comers to a "forum view" like a spoon-feeding. Thats not learning or helping.
So, I guess what you need to ask yourself is this: are you promoting a learning experience for hobbyists by allowing them to make up there own minds with information given or are you attempting to provide an intellectual consensus among your members and calling all outside of this consensus "fighting?"