Product Review: Simplicity Aquatics 5L Modular Dosing Container

by | Apr 11, 2023 | Equipment, Reef | 0 comments

In a reef aquarium you will most likely need to perform auto top off with freshwater or dose elements to maintain water chemistry.  A well designed dosing container can be the right solution for you.

Simplicity Aquatics launched their 2L Modular Dosing Containers mid 2022. I recently reviewed those here.  An up-sized 5L Modular Dosing Container (starting April 7,2023) will be available for those with larger systems or those who just want larger intervals between refills. The 5L Modular Dosing Container maintains the sleek interlocking design of its 2L predecessor. This feature allows the user to expand to as many units as desired. This design provides an integrated/clean look. The white volume gradients contrasts against the black acrylic background with good readability. The height of the straw is adjustable just in case there is sediment you want to avoid siphoning up.

The 5L Modular Dosing Container also supports the available float switch kit. These optional float switches can be purchased separately and connected to a controller of your choice.  This can be programmed to indicate when the container is empty.

I would like to thank Simplicity Aquatics/ Clear Choice Distribution for sending me these samples to review. I plan on using these Modular Dosing Containers to replace my DIY containers I’ve been using on my system. Though the DIY versions have been functional for 2 decades it is nice to focus a bit on aesthetics as well.


Product Information

Dimensions: 5.9 in. x 4.8 in. x 14.4 in.  (150 mm x 121 mm x .366 mm)

Material:      Acrylic



DIY Project

You can use the containers to mix whatever concoction you need just by combining it with a magnetic stirrer prior to dosing or turn it into an kalkwasser-reactor. Sure, you can dose kalkwasser (aka Calcium Hydroxide) with an empty milk jug, tubing and stir by hand. Bump it up a notch! Keep the solution saturated by auto-mixing continuously especially when topped off with fresh calcium hydroxide and water. You can manually activate the stirrer when refilling or connect the stirrer to a programmable smart outlet or controller for planned mixing intervals.

TIP: Be sure the magnetic pill doesn’t wear through the acrylic bottom plate by placing a sleeve of PEX (high density polyethylene) tubing around the pill. A bigger pill is not necessarily better either since the additional magnetic force can increase the wear rate of the pill coating or the acrylic base.


  • Ellery Wong

    Ellery is a mechanical systems engineer at a Fortune 500 technology company. He has automation experience in the automotive, appliance, printing and robotics industries as a product development professional but also has over 35 years of saltwater aquarium experience as a hobbyist. He currently maintains a 9 tank / 540 gallon SPS/LPS/Mixed systems. DIY is his forte!


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