It's just that high phosphorus levels usually cause an algae bloom. I've read of several people who've started dosing phosphorus and then had a massive algae explosion in their tank, including a friend of mine.
Now that i think about it, my plants are growing so fast they would probably out-compete algae for any nutrients anyway. Plus there's the whole "allelopathy" theory that could limit algae growth too.
Anyway, I'll start dosing phosphorus and see what happens. Thanks
Well, then where my algae when I add 3-5 ppm per week?
Been this way for nearly 15 years............still think high PO4 causes algae or might it just be something else that you or friends, or those you are talking to overlooked?
I know I'm adding pure bioavailable PO4 in the form of KH2PO4 into the water column.
How can it induce algae as claimed unless I also get it?
Tap water is not a factor, after 15 years, perhaps 60 reps(different tanks), I think you can figure out that the notion high PO4 = algae CANNOT possibly be correct.
Note: I'm not suggesting what causes algae here, that's an entire other question, I'm just saying there is no way that high or excess PO4 induces algae in a planted tank.
Where did you hear this from?
This idea is about 10-15 years old now.
Dosing 3x a week vs daily is not going to make any differences with K+.
The effective range is about 5-10ppm to 100ppm.
Plants are not going to use more than 2-3 ppm in 2-3 days at most.
Most use KNO3 and KH2PO4, the amount of K+ in these relative to N and PO4 are plenty, about 4x the demand relative to N.
So basically you do not need to add extra K+ on top dosing these two. you can if you want, but it will not solve the issue
Many folks mistake K+ for CO2 related issues or sometimes Mg.
Say if you are K+ limited, adding more will induce stunting or algae, then it's likely a CO2 issue, not excess K+........but folks get mixed easily and make assumptions.