Reactors & Dosing
APEX ATKv2 Automatic Top-Off Kit
$435.99
- Ships any business day
- Products we use on our own reefs
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Product details
Product details
The APEX ATKv2 Automatic Top-Off Kit is an aquarium system accessory designed to automatically add RO/DI (or other top-off) water as your tank evaporates. By using water-level monitoring plus a dedicated ATO pump and controller module, it helps keep salinity steadier between manual top-offs. This kit is intended for reliable, day-to-day top-off control in reef and freshwater setups where accurate water level management is useful.
Features:
- Includes the FMM (Fluid Monitoring Module), which can run standalone for fluid level monitoring
- Uses a pre-assembled water level mechanism with two optical water level sensors for detecting tank water height
- Supplied with a float valve option and an RO tubing-based setup for top-off delivery
- Mounts using a magnetic acrylic mount designed to work up to 1/4" glass/acrylic
- Includes an ATO pump (PMUP ATO Pump) for moving top-off water when the controller calls for it
- Includes a 24V 36W power supply for the system
- Comes with RO tubing and push-fit fittings to help simplify plumbing connections, including a siphon break and adapter fitting
- Provides a set-screw intended for non-float-valve applications, supporting alternate operating setups
Specifications:
- Fluid monitoring module: FMM – Fluid Monitoring Module (runs standalone)
- Water level sensing: Two (2) optical water level sensors
- Water level mounting: Magnetic acrylic mount (works up to 1/4" glass/acrylic)
- Valve: Float valve included
- Tubing length: 4 m orange RO tubing
- Power supply: 24V 36W power supply
- Included plumbing accessories: 90° tubing fitting; 3/8" -> 1/4" push-fit adapter; 1/4" -> 1/4" push-fit siphon break
- Pump: PMUP ATO Pump
- Included control option: Set-screw for non-float-valve applications




