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GRODAN Rockwool Starter Cubes
These pre-cut cubes give lettuce seeds a sterile, pH-neutral home to germinate in before moving into the system, with a hole sized for pelleted seeds. Keeping the cube moist, not soaked, is what determines whether germination goes well.
How to Start Seeds in Rockwool Cubes

Halatool 1.2 in Rockwool Cubes for Hydroponics, 72 Plugs Seed Starter Cubes | High Germination Rate for Vegetables & Herbs, Soilless Cultivation
- Value Package Includes: You will get 2 sheets of 1.2-inch Rockwool, a total of 72 pieces of rockwool cubes. These hydroponic pods are suitable for growing freckles romaine all year long hydroponically and work well
- Natural Material: This rockwool is a very effective hydroponics supply, made of high-quality basalt, centrifuged at high speed to form fibers after being melted at high temperature, and compressed into blocks through proprietary process, soft and even texture, good water absorption and strong air permeability, which is helpful to the growth of roots
- How to Use: Please cut the rockwool into cubes according to your needs with a knife before soaking. Then simply soak the cubes briefly (10 sec) in a nutrient solution to adjust its EC and pH value to the range required by your seeds. The optimum pH for most plant seeds is about 5.5. Then control the suitable moisture, illumination and temperature to improve germination rate of seeds. When the robust roots penetrate through the rockwool about 0.5-1 inch, transplant it into a suitable container
Cz Garden Net Cups
Net pots hold the growing medium and plant above the water or mist while letting roots grow through the slotted sides. A 3-inch size fits most home systems, whether the medium inside is rockwool or clay pebbles.
Choosing the Right Net Pot Size for Hydroponics

Cz Garden Supply 3 inch Net Cups Heavy Duty Pots Wide Rim Design – Orchids • Aquaponics • Aquaculture • Hydroponics Slotted Mesh for Kratky
- 3-1/4″ Wide by 2-1/2″ Tall x 25 pcs BLACK color. Perfectly fits in 2 inch holes for DWC growers. Easy to use with superior materials and smart design features. Grow bigger, healthier plants with less work.
- * BPA-FREE, NON-TOXIC, HEAVY DUTY durable design can withstand years of frequent use. They’re easy to clean, UV-Resistant and reusable to easily endure outdoor conditions year round.
- * THE LOWER SHIELD prevents light from penetrating hydroponic reservoirs to help eliminate pythium. LOTS OF NARROW SLITS and stars give you bigger root growth while letting roots grow their own way. Our pots work with many types of soil based and hydroponic media such as expanded clay pebbles, lava rocks, pumice, vermiculite, rockwool, etc. Grow healthier, happier plants with greater production!
Air Stone Disc
An air stone breaks the pump output into fine bubbles, giving the water far more surface area to absorb oxygen than a single stream would. An 8×8 inch disc covers more reservoir floor than a small round stone.
Air Stones in Hydroponics: Sizing and Placement

VIVOSUN Air Stone Disc 5 in with Shell and Sucker for Aquarium, Air Pump | Round Air Stone for Fish Tank and Hydroponics
- Fine Bubbles: The air stone produces lots of dense fine bubbles; A great way to oxygenate your hydroponic growth systems, ponds, aquariums and enliven the aquatic life
- Size: 5″ – 5″ D x 0.8″ H; Recommended air pump power: 4 – 16 W; Standard ID airline tubing: 0.16″ / 4 mm
- Durable Material: Made of mineral material and sintered at a high temperature; The material is sturdy and durable which is safe to your fish safe for your fish