The Hydro-Logic Poly Tubing – Blue 3/8 in 50 ft Roll is flexible polyethylene supply tubing for hydroponic water delivery, drip irrigation, and filtration line runs. The blue color coding allows quick visual identification when multiple tubing lines run alongside each other in a grow room or greenhouse. Each roll provides 50 feet of tubing — enough to route feed lines from a reservoir to multiple grow sites without mid-run splices.
Hydro-Logic Poly Tubing – Blue 3/8 in Specifications
The specifications below are derived from the product title and canonical attributes. The 3/8 in diameter is the standard inner diameter for main feed lines in drip-irrigation and recirculating hydroponic systems.
| Specification | Value |
|---|---|
| Brand | Sunlight Supply / Hydro-Logic |
| Tubing Color | Blue |
| Inner Diameter | 3/8 in |
| Roll Length | 50 ft |
| Material | Polyethylene (poly) |
| Weight (per roll) | approx. 2.0 lb |
Why Choose Hydro-Logic Poly Tubing – Blue 3/8 in
Poly tubing is one of the most fundamental components in a hydroponic or drip-irrigation setup. Here is what makes this roll a practical choice:
- Color-coded for clarity: The blue color distinguishes this line from black, clear, or red lines running in parallel. In a multi-strain or multi-zone grow room where several feed lines share the same run path, color coding reduces mis-routing and makes troubleshooting faster.
- 3/8 in diameter is the hydroponic standard: This inner diameter fits the barbed fittings used on most drip emitters, manifolds, and inline filters without adapters. It is the most common size for main supply lines in recirculating deep water culture (RDWC), drip-to-waste, and NFT systems.
- 50 ft roll covers most grow-room runs: A single roll is sufficient for routing a main feed line from a reservoir to a manifold in rooms up to roughly 20 by 25 feet, or for supplying several shorter branch lines. No mid-run splices means fewer potential leak points.
- Flexible polyethylene construction: Poly tubing remains pliable at typical indoor grow temperatures (60–85°F) and resists kinking when routed around equipment. It is compatible with standard nutrient solutions and will not leach plasticizers into the feed water under normal operating conditions.
- Distributed by Sunlight Supply / Hydro-Logic: Sunlight Supply is a long-established horticultural distributor. Hydro-Logic products are stocked by authorized hydro retailers and carry consistent quality control across production lots.
Best Uses for Hydro-Logic Poly Tubing – Blue 3/8 in
This tubing is a general-purpose supply line suited to a wide range of indoor and greenhouse growing configurations. Typical applications include:
- Main reservoir-to-manifold runs: Route the 50 ft roll from a nutrient reservoir to a central manifold, then split to individual plant sites using 1/4 in branch tubing or drip emitters.
- Recirculating hydroponic systems (RDWC, NFT): Use as the primary return or supply line between reservoir and grow sites. The 3/8 in bore supports adequate flow rates for most small-to-medium recirculating systems without requiring a high-pressure pump upgrade.
- Drip-to-waste irrigation: Connect from a pressure-regulated pump output to a drip manifold in coco or rockwool-based setups. The blue color simplifies identification of the nutrient feed line versus the drain or pH-up/down lines.
- Inline filter connections: Most inline sediment and carbon filters for grow rooms use 3/8 in barb fittings. This tubing connects directly without step-up or step-down adapters.
- Replacement and extension runs: When expanding an existing system, this roll provides extra length to extend feed lines to new plant sites or to replace deteriorated tubing sections.
- Greenhouse and outdoor drip lines: Flexible poly tubing handles seasonal temperature swings better than rigid PVC and is easy to re-route when plant layout changes between cycles.
If your grow room also requires environmental airflow management, the Air Box 4 pre-filter and Active Air HD pedestal fan are common companion components for Climate & Environment builds.
Sources & Further Reading
Product specifications and brand information for Hydro-Logic tubing distributed by Sunlight Supply (now part of Hawthorne Gardening Company):







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