kschyff
Member
Hi,
I have a question about potassium in relation to its use as a fertilizer. When I use Aquasoil (which they say has no K) in a dry start all the plants grow like crazy without any issues. I spray with RO water and all is well as far as I can see. In other words, there is growth without the addition of K. However, when I flood the aquarium all of a sudden I have to dose K. I am not a biologist, but maybe someone can explain this to me. The AS I use specifically states that there is virtually no K in it.
I am reaching here when I say the following: In another aquarium where I use a peat-based substrate covered with inert gravel, I dose EI (full) but leave out the micros as the manufacturers state that I should avoid this for the first 3 months. To add minerals I use MgSO4 and CaCl. As per the Fert calculator. In this aquarium I notice yellowing in my crypts with dark veins, stunted and curled leaf tips etc. So I try a some research and found an academic article that states that for terrestrials plants too much K can cause problems for magnesium uptake.
Am I way off track? If so, please correct my thinking here.
I have a question about potassium in relation to its use as a fertilizer. When I use Aquasoil (which they say has no K) in a dry start all the plants grow like crazy without any issues. I spray with RO water and all is well as far as I can see. In other words, there is growth without the addition of K. However, when I flood the aquarium all of a sudden I have to dose K. I am not a biologist, but maybe someone can explain this to me. The AS I use specifically states that there is virtually no K in it.
I am reaching here when I say the following: In another aquarium where I use a peat-based substrate covered with inert gravel, I dose EI (full) but leave out the micros as the manufacturers state that I should avoid this for the first 3 months. To add minerals I use MgSO4 and CaCl. As per the Fert calculator. In this aquarium I notice yellowing in my crypts with dark veins, stunted and curled leaf tips etc. So I try a some research and found an academic article that states that for terrestrials plants too much K can cause problems for magnesium uptake.
Am I way off track? If so, please correct my thinking here.