Hi, Have been using Estimative Index, since November. This is currently working on a routine of 2 water changes of 20% a week.
The formula for my dosing liquids are included below from my original posting back in Oct / Nov
Using James' planted tank calculator, I carried out the following maths:
1000ml solutions, dosing 25 ml per dose of macro and trace solutions. (Keep both the same, keep it easy!)
All the figures below have been slightly rounded where sensible.
Macro solution (1000ml):
Potassium Nitrate 162 g (27 teaspoons) = 3 x 10ppm doses per week
Potassium Phosphate 29 g (4.5 teaspoons) = 3 x 2ppm doses per week
The above two amounts also provide 3 x 7ppm doses of Potassium per week.
Trace Solution (1000ml):
60g provides correct amounts for 2 x 25ml doses per week.
I was getting a lot of hair algae but no other type. I have now got about 30 largish Amano shrimp in the tank and they keep it absolutely spotless. They are the most amazing ally in the tank!
However, I thought I ought to do a water quality test just to keep an eye on how things are.
Everything looked good, no high level of Nitrate or Nitrite, No ammonia, things looking hunky dory until I got to Phosphate. Never had a problem with this, and the water going into the tank has a phosphate level of almost 0, so I was shocked to see the phosphate level in my tank is over 5 mg/l.
Surely this isn't healthy, or good for the dicsus in there? How come the plants seem to be using everything they're provided with except the phosphate? Does this mean I got the amount of pottasium phosphate in my macro mix hideously wrong?
Should I try and get the phosphate level down, or just mix up a new macro mix with less pottasioum phosphate and keep going with the dosing regime?
Any thoughts appreciated.