Vitalink
Price range: £12.99 through £41.99
Grotek
Price range: £12.30 through £33.65
Canna
Price range: £6.95 through £45.95
General Hydroponics (GHE)
Price range: £5.45 through £55.00
Advanced Nutrients
Price range: £18.99 through £79.99
Hydrotops
Price range: £17.00 through £215.00