0Cart

Water Filtration & Treatment

Pre-Filters
Sort by:
Price: High to Low
Show:
20
General Hydroponics PRO pH Down - 2.5gal
In Stock: 68
$111.63 $168.07 -34%
General Hydroponics PRO pH Up - 2.5gal
In Stock: 32
$111.63 $168.07 -34%
HydroLogic smallBoy Dechlorinator & Sediment Water Filtration System - 1 GPM - 5 Micron
In Stock: 36
$110.62 $133.66 -17%
HydroLogic ARCS System Stage 1 Replacement Cartridge - Stage 1 - Sediment Filter
In Stock: 15
$107.98 $130.47 -17%
HydroLogic PreEvolution KDF Catalytic Carbon Filter
In Stock: 45
$98.63 $114.95 -14%
Alchemist™ H2O2 Liquid Oxygen - 5gal (OR)
Out of stock
$94.35 $135.16 -30%
HydroLogic BIGboy Green Coconut Carbon Filter - 7 GPM - 5 Micron Filtration
In Stock: 103
$93.26 $112.68 -17%
Cutting Edge Solutions pH Down, 1 gal, case of 4
In Stock: 52
$92.40 $135.96 -32%
Cutting Edge Solutions pH Up, 1 gal, case of 4
In Stock: 33
$92.40 $135.96 -32%
HydroLogic Evolution-RO 1000 Wall Mount Bracket - Stainless Steel
In Stock: 12
$92.13 $111.32 -17%
HydroLogic PreEvolution ChloraShield Replaceable Carbon Filter Upgrade - 1 GPM - 1 Micron
In Stock: 29
$89.89 $108.60 -17%
Biobizz Bio-PH- PH Regulator 5L pH DOWN
In Stock: 7
$87.46 $126.76 -31%
Biobizz Bio-PH+ PH Regulator 5L pH UP
In Stock: 7
$81.21 $117.70 -31%
HydroLogic Evolution-RO 1000 Fitting Kit
In Stock: 9
$80.76 $87.86 -8%
Polyester Element for Spin-Down Sediment Filters | 2in - 140 Mesh
Out of stock
$78.54 $79.12 -1%
HydroLogic TALLBoy KDF85 Catalytic Carbon Filter Upgrade
In Stock: 27
$73.30 $84.95 -14%
HydroLogic Evolution-RO ChloraShield Replaceable Carbon Filter Upgrade - 1 GPM - 1 Micron
In Stock: 197
$71.97 $83.95 -14%
HydroLogic BIGboy Sediment Filter - Pleated - Cleanable
In Stock: 257
$68.52 $82.79 -17%
HydroLogic Evolution-RO 1000 Filter Housing
In Stock: 15
$66.65 $72.50 -8%
HydroLogic TALLBoy ChloraShield Replaceable Carbon Filter Upgrade - 2 GPM - 1 Micron
In Stock: 12
$51.00 $73.45 -31%
Show other 20 products
Product filters
Free Shipping
In Stock
Price
$
–
$
  • $2
  • $96624
Shop Owner
Brand
    Show all (20)