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. . GP (1000x) concentrate - 10 litre Drum
* Makes: 10,000 litres of GP medium at final concentration. * Nutrient Balance: When added to your seawater + freshwater mix (seawater : freshwater = 3 : 1 ) according to the accompanying instructions, this formulation will provide the following nutrient levels (Loeblich and Smith, 1968):
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| Nutrient | Final conc per litre (g/l) | |
| FeCl3.6H2O | 1.45 mg | |
| KNO3 | 200 mg | |
| NaH2PO4.2H20 | 34.8 mg | |
| H3BO3 | 34.2 mg | |
| EDTA.2H20 | 30 mg | |
| MnCl2.4H20 | 4.3 mg | |
| CoCl2.6H20 | 0.13 mg | |
| ZnSO4.7H20 | 0.364 mg | |
| Biotin | 0.002 mg | |
| Vit B12 | 0.001 mg | |
| Thiamine HCl | 0.1 mg |
* To Make GP base: Pour 1 litre from the 10 litre Drum (Part A) into a sterile culture bag. Add 10ml from the 100 ml bottle of Part B. Add 750 litres of sterile seawater + 250 litres of sterile fresh-water. Mix and aerate and you've got 1000 litres of GSe base
* To Make Full GP (with soil extract): Pour 1 litre from the 10 litre drum (Part A) into a sterile culture bag. Add 10ml from the 100 ml syringe of Part B. Add 5 litres of soil extract. Add 750 litres of sterile seawater + 250 litres of sterile fresh-water. Mix and aerate and you've got 1000 litres of Full GSe medium
* Reference: Loeblich, A.R and Smith, V.E. "Chloroplast pigments of the marine dinoflagellate Gyrodinium resplendens": Lipids 3: 5-13, 1968.
* Sterility preparation; concentrate is 0.2 micron filtered.