Starter Algae Instructions for Use

When starting your algae culture we recommend: 

  • Salinity 1.025 to 1.030
  • Water Temp 25C
  • Add F/2* is the perfect nutrient media for algae, is silica free and is widely used as a general enriched medium for growing algae.

  • Store starter algae in a fridge for up to 90 days, should be shaken weekly

 

*F/2 is a common and widely used general enriched seawater medium designed for growing coastal marine algae, especially diatoms.  The concentration of the original formulation, termed "f Medium" (Guillard and Ryther 1962), has been reduced by half.

To make your own F/2:

 To prepare, begin with 950 mL of filtered natural seawater and add the following components. The trace element and vitamin solutions are provided below. Bring the final volume to 1 liter with filtered natural seawater. If the alga to be grown does not require silica, then it is recommended that the silica be omitted because it enhances precipitation. Autoclave.

Table 1: f/2 Stock Solution Chemical Composition

Components

Stock Solution

Quantity

Molar Concentration in Final Medium

NaNO3

75 g/L dH2O

1 mL

8.82 x10-4M

NaH2PO4 H2O

5 g/L dH2O

1 mL

3.62 x 10-5 M

Na2CO3

30 g/L dH2O

1 mL

1.06 x 10-4 M

Trace Metal Solution

See table 2

1 mL 

---

Vitamin Solution

See Table 3

0.5 mL

---

 

To prepare, begin with 950 mL of dH2O, add the components and bring final volume to 1 liter with dH2O. Autoclave. Note that the original medium (Guillard and Ryther 1962) used ferric sequestrene; we have substituted Na2EDTA · 2H2O and FeCl3 · 6 H2O

Table 2: Trace Metal Composition

Components

Stock Solution

Quantity

Molar Concentration in Final Medium

FeCl3 6(H2O)

---

3.15 g

1.17 x10-5M

Na2(EDTA)2(H2O)

---

4.36 g

1.17 x10-5M

CuSO4 5(H2O)

9.8 g/L dH2O

1 mL

3.93x10-8 M 

 Na2MoO4 2(H2O)     

6.3 g/L dH2O

1 mL

2.60 x10-8 M

ZnSO4 7(H2O)

22.0 g/L dH2O

1 mL

7.65 x10-8 M

CoCl2 6(H2O)

10.0 g/L dH2O

1 mL

4.20 x10-8 M

MnCl2 4(H2O)

180.0 g/L dH2O

1 mL

9.10 x10-7 M 

 

First, prepare primary stock solutions. To prepare final vitamin solution, begin with 950 mL of dH2O, dissolve the thiamine, add the amounts of the primary stocks as indicated in the quantity column below, and bring final volume to 1 liter with dH2O. We autoclave to sterilize. Store in refrigerator or freezer.

Table 3: Vitamin Composition

Components

Stock Solution

Quantity

Molar Concentration in Final Medium

thiamine HCl

(vitamin B1)

---

200 mg

2.96 x10-7 M

 Biotin

(Vitamin H)

0.1 g/L dH2O

10 mL

2.05 x10-9 M

 Cyanocobalamin

(Vitamin B12)

1 g/L dH2O

1 mL

3.69 x10-10 M

 

CITATIONS

  1. Guillard, R.R.L. 1975. Culture of phytoplankton for feeding marine invertebrates. pp 26- 60. In Smith W.L. and Chanley M.H (Eds.) Culture of Marine Invertebrate Animals. Plenum Press, New York, USA.
  2. Guillard, R.R.L. and Ryther, J.H. 1962. Studies of marine planktonic diatoms. I. Cyclotella nana Hustedt and Detonula confervacea Cleve. Can. J. Microbiol. 8: 229-239.