The problem with the advice dished out on that thread is not that it is wrong exactly but that it is fragmentary and therefore open to bad interpretation. This guys problem isn't really that he has too little nitrate, it is that he has to little nitrogen relative to the amount of phosphate, as made clear in samw's google results. You can fix this problem by either increasing nitrogen (nitrate or ammonia) or decreasing phosphate to get back to a good balance for plant growth. The plants will out compete the cyano and it will die, I imagine everyone can agree that is true.
The problem with I find with internet posts is often the brevity, this is what leads to the bad interpretations. Poster A says "I heard somewhere that you have to increase nitrate". Advice seeker says "How"? Poster B says "Add more fish". = Bad advice.
IMO, it all goes back to the first couple of posts usually. You get a quick put poorly explained bit of info and even if it is technically correct you then get a stampede of supposition and bad interpretation. I think if people took more time with their posts and made an effort to explain things more fully we'd avoid a lot of this stuff.
I don't mean to attack the community for the way we do things either. I dish out aquarium advice for a living, nobody knows better than me that it can be difficult to do well. If somebody came in and asked me this question I could easily spend 20 minutes talking about macro nutrients and the N:P:K balance and it's a comparatively simple subject. This would lead them to walking away shaking their head and maybe retaining a tenth of what I had to say. That would also amount to bad advice and it's something I tend to do sometimes.
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All research i've read says that though cyano can convert it needs to be in a phosphorus rich environment. Like I said remove phosphates/nitrates problem solved remove detrious/increase flow problem stays gone. I'm not trying to start a ****ing contest here just defending my statements. Are these facts not true,they came from your data? Maybe Im reading this wrong
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Your info isn't wrong it's just incomplete.