Originally Posted by Solcielo lawrencia
Cyanobacteria requires some of the nutrients to grow. If there's excess, it will take advantage of it, especially iron.
Any reference or experiment that shows that increased iron induces BGA bloom ?
I asked you in the other thread on cyanobacteria and you did not answer. Is cyanobacteria another sign of trace toxicity ? If we stop dosing traces will the cyanobacteria stop growing and die ? What level of iron and what ratio to other nutrients induces cyanobacteria ?
Don't worry about traces, this guy writes that sentence on any thread showing problems. He previously said traces kill algae because they are so toxic...
Are you using PPS or PPS- Pro ? Do you add PO4 ? Maybe you are lean on NO3, could you test if they are above 10ppm ? I would increase NO3 as a first step.
Low NO3 could have induced BGA, but increasing it does not cure it. I use erythromycin for that. There are other methods, this worked for me.
Remove all the algae you can .
"Add 2.5 mg/L erythromycin. If you have a protein
skimmer, turn it off. I believe it will inactive a lot of the
antibiotic through coprecipitation with protein. It will,
however, be very usefull later.
Add 2.5 mg/L erythromycin.
Now you should see a lot of dead blue-green bacteria
floating around in the tank. Increase filtration (a second
mechanical filter if possible) to get rid of it. If you have a
protein skimmer, turn it on. The critical thing now is to get
rid of as much protein (dead bacteria) as possible to avoid a
peak of ammonia.
Most blue-green bacteria should be dead by now. Try to
clean out as much as possible of the dead stuff. I use a jet
stream of water from the outlet of a canister filter to remove
it from plants and decorations. Combined with the second
mechanical filter, this works fine for me. Let the filter work
for a couple of hours then make a 50% water change. Add 2.5
Wash the mechanical filter at least once a day. Keep
check on ammonia and nitrite but do not change any water
unless absolutely necessary. The extra filter can be removed
as soon as the water clears up.
Make a 30% water change. Add 1 mg/L erythromycin.
From now on, resume your normal maintenance."