0Cart

Water Filtration & Treatment

Pre-Filters
Sort by:
Price: High to Low
Show:
32
HydroLogic TALLBoy Poly-Spun Sediment Filter - 20in x 2.5in - 5 Micron - Single Use
In Stock: 69
$16.81 $20.31 -17%
General Hydroponics pH Control Kit - 4pc - 8oz pH UP, 8oz pH DOWN, 1oz Indicator, & Vial
In Stock: 3091
$16.62 $22.75 -27%
Microbe Life Hydroponics pH UP, 1 qt
In Stock: 67
$16.45 $19.99 -18%
Microbe Life Hydroponics pH DOWN, 1 qt
In Stock: 80
$16.45 $19.99 -18%
Alchemist H2O2 Liquid Oxygen 34% (1 Quart)
In Stock: 1440
$15.80
Central Coast Garden pH Down Solution | 32oz - Concentrate - 75% Phosphoric Acid
Out of stock
$15.21 $19.95 -24%
Central Coast Garden pH Up Solution | 32oz - 35% Potassium Hydroxide
Out of stock
$15.21 $19.95 -24%
Leader FA5 Clear Filter Housing | 5in - Transparent - 1in Female Thread
In Stock: 146
$14.49 $38.57 -62%
HydroLogic smallBoy Poly-Spun Sediment Filter - 10in x 2.5in - 5 Micron - Single Use
In Stock: 523
$13.41 $16.24 -17%
General Hydroponics pH Down Liquid - 32oz
In Stock: 4061
$11.44 $15.68 -27%
General Hydroponics pH Up Liquid - 32oz
In Stock: 2577
$11.44 $15.68 -27%
General Hydroponics pH Test Indicator - 8oz
In Stock: 575
$10.61 $14.53 -27%
Cutting Edge Solutions pH Down | 32oz Bottle
In Stock: 82
$10.03 $13.99 -28%
Cutting Edge Solutions pH Up | 32oz Bottle
In Stock: 17
$10.03 $13.99 -28%
Greengro Biologicals Water Conditioner | 8oz - Liquid Concentrate - Removes, Detoxifies & Neutralizes
In Stock: 140
$9.66 $18.49 -48%
General Hydroponics pH Down Liquid - 8oz
In Stock: 526
$8.20 $10.59 -23%
General Hydroponics pH Up Liquid - 8oz
In Stock: 434
$8.20 $10.59 -23%
Dramm In-Line Hose Filter | With Element - 80 Mesh
In Stock: 4
$8.01 $8.97 -11%
General Hydroponics pH Test Kit Indicator - 1oz
In Stock: 1505
$7.74 $10.15 -24%
Netafim Disc Filter Cover O-Ring | 3/4in - 120 Mesh
In Stock: 42
$7.01 $12.90 -46%
Leader CRL5 Mesh Sediment Filter | 5in - 20 Micron
In Stock: 456
$6.38 $15.71 -59%
HydroLogic Stealth-RO Double Ended Wrench - For Standard Filter & Membrane Housings
In Stock: 91
$5.63 $7.30 -23%
HydroLogic Stealth-RO Quick Connect Membrane Elbows | 1/8in NPT x 1/4in QC - Black
Out of stock
$4.27 $4.64 -8%
HydroLogic Stealth-RO Quick Connect Membrane Elbows | 1/8in NPT x 1/4in QC - White
Out of stock
$2.69 $2.93 -8%
Product filters
Free Shipping
In Stock
Price
$
–
$
  • $2
  • $96624
Shop Owner
Brand
    Show all (20)