nelson said:
hi
here goes,
215 litres
co2 fe
tap water
14-21dGH
15kh
50-50 ro and tap water
going to read through the link a couple of times
thanks
neil
OK, well because this is a high tech injected tank the EI baseline numbers will be a good start. If you had a non injected tank the dosages would be only a fraction of these values. The baseline dosing scheme could be patterned after a ratio of the 20G article sample. Your tank is 54G but we'll call it a 50G. if this is the case you would multiply the articles 20G numbers by 50G/20G=> 5/2.
Sunday â€“ 50% or more Water Change then dose 5/2x[3/16 teaspoon KNO3] + 5/2x[1/16 teaspoon KH2PO4] + 5/2x[Â½ teaspoon MgSO4]
Monday â€“ 5/2x1/16 teaspoon CSM+B
Tuesday - 5/2x[3/16 teaspoon KNO3] + 5/2x[1/16 teaspoon KH2PO4] + 5/2x[Â½ teaspoon MgSO4]
Wednesday - 1/16 teaspoon CSM+B
Thursday - 5/2x[3/16 teaspoon KNO3] + 5/2x[1/16 teaspoon KH2PO4] + 5/2x[Â½ teaspoon MgSO4]
Friday â€“ Rest
Saturday - Rest
The result is as follows:
Sunday â€“ 50% or more Water Change then dose [Â½ teaspoon KNO3] + [1/8 teaspoon KH2PO4] + [1Â¼ teaspoon MgSO4]
Monday â€“ Â¼ teaspoon CSM+B
Tuesday - [Â½ teaspoon KNO3] + [1/8 teaspoon KH2PO4] + [1Â¼ teaspoon MgSO4]
Wednesday - Â¼ teaspoon CSM+B
Thursday - [Â½ teaspoon KNO3] + [1/8 teaspoon KH2PO4] + [1Â¼ teaspoon MgSO4]
Friday â€“ Rest
Saturday - Rest
As explained in the article, there is no need to be exact. When I multiplied the two fractions 5/2 times 3/16 the result is 15/32 but this is a ridiculous fraction to try to measure with a teaspoon so I rounded up to 16/32 which of course is Â½. Similarly, 5/2 times 1/16 equals 5/32 so I round down to 4/32 which is 1/8.
According to your GH you should have high levels of Calcium and Magnesium, but we never really know unless we can reliably test, in what ratio these two are present. It's possible to have all Calcium, or all magnesium - or any combination of the two. Since having more than you need never hurts, but having less than you need always hurts, it's best to start with the listed MgSO4 dosing until the plants growth reveal that you can lower the dosing level of the MgSO4. This is a valid course of action especially in light of the fact that you are cutting the water with RO, which means that you are adding new water with a composite GH closer to 7-10.5 instead of the original tap water's 14-21.
Depending on the nitrate and phosphate levels of your tap water you may be able to lower the dosages from this baseline scheme, but again, having more than you need does little damage but underdosing can kill you. If you live in an agricultural zone then more than likely you will be able to lower your KNO3 and KH2PO4 dosages as the tap will be high in these due to runoff, but it's wiser to make life easy for yourself and just follow the scheme until you have a better feel.
Hope this helps.
Cheers,