A question here re uptake rates vs light levels.
For example, I see a pretty consistent EI recommendation of 1/4tsp of KNO3 3x a week per 20g (or more usally 1/2 tsp 3x a week for a 55g). That's 10mg/l of NO3 per dose or 30mg/l per week.
And 10ml of CSM+B 3x a week (at a concentration of 1tbsp in 250ml) gives you around 0.2 mg/l of Fe per dose or 0.6mg/l per week.
This recommendation is based on uptake at what light levels? I find it a bit difficult to accept that one should use the same dosing at 2wpg as at 6wpg...
I would think it would be useful to have a recommendation for different wpg levels. I know that there are other variables that influence it and that wpg is not that great an indicator of lighting, but it would make sense to have a dosing recommendation based on lighting levels, no?
I have a heavily planted 200l tank (about 175l net volume) with 5x 25w NO flourescent tubes (T8s) on it. That gives me about 2.3wpg. Should I still dose the same amount of KNO3 as recommended above? Given CO2 at >30mg/l and sufficient levels of other nutrients, does 2.3wpg induce such an uptake rate?
For example, I see a pretty consistent EI recommendation of 1/4tsp of KNO3 3x a week per 20g (or more usally 1/2 tsp 3x a week for a 55g). That's 10mg/l of NO3 per dose or 30mg/l per week.
And 10ml of CSM+B 3x a week (at a concentration of 1tbsp in 250ml) gives you around 0.2 mg/l of Fe per dose or 0.6mg/l per week.
This recommendation is based on uptake at what light levels? I find it a bit difficult to accept that one should use the same dosing at 2wpg as at 6wpg...
I would think it would be useful to have a recommendation for different wpg levels. I know that there are other variables that influence it and that wpg is not that great an indicator of lighting, but it would make sense to have a dosing recommendation based on lighting levels, no?
I have a heavily planted 200l tank (about 175l net volume) with 5x 25w NO flourescent tubes (T8s) on it. That gives me about 2.3wpg. Should I still dose the same amount of KNO3 as recommended above? Given CO2 at >30mg/l and sufficient levels of other nutrients, does 2.3wpg induce such an uptake rate?