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8oz Bottle of Guillard’s F/2 concentrate 8oz Bottle of Guillard’s F/2 concentrate 8oz Bottle of Guillard’s F/2 concentrate

8oz Bottle of Guillard’s F/2 concentrate

algae culture medium

Guillard’s F/2 concentrate


8 fluid ounces (237ml) of concentrated Guillard’s F/2 growth media

Based on the formula by published by Guillard and Ryther in 1962 this concentrate is ideal for culturing Marine Phytoplankton and Greenwater.

The concentration of the original formulation, termed "f Medium" is halved, hence “f/2 medium”.

altered to not contain Silicates, alga to be grown should not require silica (not for Diatom cultures).

add concentrate to pure (or fresh mixed) seawater at 1ml per L to create the growth medium for growing marine algae.

an 8 oz bottle can create 62 gallons of growth medium.

Also works very well as a fertilizer for growing freshwater greenwater – dose at same concentration (1ml per L) to pure water.

shipping notes:

I only ship to addresses within the continental US at this time.

I ship on Mondays and Tuesdays – your lot will be shipped the first Monday or Tuesday after payment.

Each 8oz bottle counts as 1 “dry good” for shipping purposes, or 1 “critter” if combining with live goods.

Current Price: $10.00

Sale: $8.00

Stock Level: 3

Seller Info

Store Name: BlueBlade Fish

Store Rating:

Seller Location: Texas, United States

Shipping: Please review checkout for final shipping options based on items selected, quantity, and groupings.

  • DFW local pick up (contact to arrange) any amount: Fits 99 for $0.00
  • 2 day air (no guarantee) Med: Fits 6 for $24.00
  • Ground (Near TX & no guarantee) Med: Fits 12 for $14.50
  • NextDay + live arrival Guarantee Med: Fits 12 for $48.00
  • Std Post, small bag (not for live animals) Bubble mailer: Fits 2 for $6.50
  • Ground shipping - standard package (not for live animals) Small: Fits 6 for $9.25
  • Ground shipping - standard package (not for live animals) Med: Fits 12 for $11.80

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