Reverse Osmosis & Water Filters for Indoor Growing

Clean irrigation water is the foundation for stable pH/EC values and efficient nutrient uptake. Tap water often contains chlorine and other substances that can hinder plant growth – this is where GrowMax solutions come in. There are two product groups: 2-stage water filters, which mainly remove chlorine and sediments (EC remains unchanged), and reverse osmosis (RO) systems, which significantly reduce salts and heavy metals, lowering the EC value.

Find the right solution quickly

• 2-stage water filters (EC remains unchanged) – sediment & carbon filtration, powered only by water pressure:
  • GrowMax Eco Grow 240 – up to 240 l/h, removes up to 99% chlorine/contaminants; EC not lowered; simple, power-free installation.
  • GrowMax Garden Grow 480 – up to 480 l/h; EC unchanged; filter change typically every 4–6 months or ~27,000 l; includes mounting accessories (3/4″ thread).
  • GrowMax Super Grow 800 – up to 800 l/h; EC remains the same; power-free; filter replacement about every 4–6 months or ~27,000 l.
  • GrowMax Pro Grow 2000 – up to 2,000 l/h; EC unchanged; designed for very high flow; filter replacement about every 4–6 months or ~56,000 l.
• Reverse osmosis systems (EC strongly reduced) – ideal for hydro/coco setups and hard tap water:
  • GrowMax Power Grow 500 – up to 500 l/day; reduces ~90–95% salts/heavy metals, EC < 0.1, pH ~6.5; perfect for precise nutrient dosing.
  • GrowMax Mega Grow 1000 – up to 1,000 l/day; same performance with higher capacity; easy installation and no electricity required.
  • GrowMax Maxquarium 000 PPM (RO + deionization) – up to 500 l/day; with an additional deionization stage for nearly 0 ppm – maximum purity.

Spare parts & accessories

• GrowMax Membrane 150 GPD – replacement RO membrane: 1 pc for Power Grow 500; 2 pcs each for Mega Grow 1000 and Maxquarium.
• Replacement Filter Pack 10″ × 2.5″ – pre-filter set (sediment + carbon) for Eco Grow 240, Power Grow 500, Mega Grow 1000, and Maxquarium.
• Deionization Filter 10″ × 2.5″ – replacement cartridge for the Maxquarium deionization stage; regular replacement keeps near 100% desalination performance.
• Garden Grow Replacement Filters – set for Garden Grow 480 (coconut carbon + 5 µm sediment), typically changed after ~27,000 l.
• Super Grow Replacement Filters – set for Super Grow 800; typically changed after ~27,000 l.
• Pro Grow Replacement Filters – set for Pro Grow 2000; typically changed after ~56,000 l.
• Float Valve Kit Overflow Protection – high/low pressure float valve (incl. 1/4″ & 3/8″ connectors) for safe reservoir filling.

Practical tips for choosing

• Just chlorine/odor removal, high throughput? – Eco/Garden/Super/Pro Grow. Operate without power and leave EC unchanged.
• High EC/hard tap water or hydro growing? – choose an RO system (Power/Mega). EC drops to near 0, pH stays stable; remineralize by raising EC to ~0.4 (e.g. with Cal-Mag).
• Need maximum purity (0 ppm)? – Maxquarium 000 PPM with deionization stage.
• Maintenance: Pre-filters should be replaced every 4–6 months or at the specified liter capacity; RO membranes should be replaced when performance decreases.

From quick chlorine removal to full 0-ppm purification, you’ll find the right system for your grow here – complete with all the matching spare parts and practical upgrades.