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See the water level at a glance and water with greater confidence.
Fitting: 19–21 cm · Scale: MIN · OPT · MAX
Water level indicator TOP21, (p6292) (for Hydroponic Pots) makes water checks in larger hydroculture planters simple and clear. Its MIN, OPT and MAX scale rises and falls with free water in the reservoir, so you can see the available reserve without lifting the plant or guessing. This model features an integrated nutrient shaft and plastic ball float and is selected for large hydroculture planters or liners with a depth of approximately 19–21 cm. It supports a calmer, repeatable care routine, provided that the actual planting depth is measured first and the float is left free to move.
The float follows free water in the watertight reservoir and transfers that movement to the visible scale. This provides a consistent reference without dismantling the planter.
Follow the changing level without lifting the liner or disturbing the plant.
Planting depth is clearly distinguished from the overall height of the product and planter.
MIN, OPT and MAX replace blind estimation with a visible point of reference.
One water-level indicator, model TOP21, code p6292.
The cultivation pot or liner, growing medium, outer planter, plant and nutrient products are sold separately.
Choose the combination that fits your planter and add the products together to the cart at a bundle price.
Planting depth is the functional measurement inside the system. It is not necessarily the same as the indicator's overall height or the decorative planter's external height.
for large hydroculture planters or liners with a depth of approximately 19–21 cm.
Overall size helps check available clearance, but it does not replace measuring the planting depth.
Combines visible water control and reservoir access in one compact body.
The nutrient shaft does not mean that any fertiliser can be added without measured dosing. Use a suitable product and follow its label.
Dimensions are nominal/approximate. For an existing hydroculture planter, measure the actual internal space before purchase.
The scale follows the level of free water in the watertight reservoir. It does not measure moisture in LECA, Pon or another substrate, and it cannot assess root condition.
Observe the plant's water use and plan the next refill. There is no single fixed interval for every plant and season.
Add water slowly and stop at OPT unless the specific plant or system instructions require a different approach.
Use it selectively, for example before a period away. It is not automatically the permanent level for everyday care.
Correct fitting and free movement of the mechanism matter more than filling quickly.
Confirm that the hydroculture planter matches the 19–21 cm fitting depth.
Position it vertically so the base or float reaches the reservoir without being forced.
Before completing the installation, make sure the reading rises and falls without friction or sticking.
Add water gradually, watch the scale and stop at the chosen target.
Hydroculture water-level indicator with a MIN, OPT and MAX scale, selected for a fitting depth of 19–21 cm.
Approximately 21 cm high, with an integrated nutrient shaft and a plastic ball float for smooth indicator movement.
It features an integrated nutrient shaft and plastic ball float.
No separate extension is required for the stated fitting depth. Do not modify or cut the indicator body.
Mineral deposits, fine granules or organic residue can restrict the mechanism.
Remove loose residue without high heat or aggressive cleaners.
The reading should move smoothly and return without sticking.
Clean when movement slows or mineral build-up becomes visible.
Pair it with a suitable liner or cultivation pot, clean growing medium and a watertight outer planter.
Find cultivation containers that provide a controlled reservoir and room for the indicator.
View the collection→Clean granules that support roots while leaving room for air and water.
View LECA options→Without a drainage hole and with enough room for the inner pot and reservoir.
View outer planters→The essentials of LECA, water level, plant transfer and consistent maintenance.
Open the guide→Short answers on fitting, correct readings and cleaning.
Measure the actual internal planting depth of the liner or cultivation pot. TOP21 is intended for large hydroculture planters or liners with a depth of approximately 19–21 cm.
Not necessarily. This model is selected for 19–21 cm, while its overall size/format is Approximately 21 cm high.
No. It displays the level of free water in the watertight reservoir. It does not measure moisture in LECA, Pon or soil.
No. OPT is the normal refill target. MAX is used selectively for a larger temporary reserve, depending on the plant and conditions.
There is no rigid interval that suits every plant. Follow the falling reading together with season, temperature, light and the water use of the specific plant.
Remove and rinse the indicator, then check for mineral deposits, fine granules or residue obstructing the float. Refit it without forcing it.
It is designed for a system with a free-water reservoir and the correct fitting position. It does not work as a soil-moisture meter in a conventional pot.
One Water level indicator TOP21 (p6292). The planter, liner, LECA, plant, outer pot and nutrient products are sold separately.
© Original product description and diagram by Greenleaf Garden Center. All rights reserved. Copying or reproduction is prohibited.
