Different generations
Fluval Plant 3.0 and 4.0 are different lights
The Plant 4.0 has its own controls and specifications. We keep the Plant 3.0 page for owners, and it doesn’t send you to the 4.0. A newer version coming out doesn’t mean the older one is discontinued.
Source: Fluval Plant 4.0 specifications and controls, read
Tank size from the catalog
Aqueon QuietFlow Pro (item 100552233): rated up to 20 gallons, no published flow
We keep this exact item separate from the older QuietFlow LED PRO so owners can find it. Aqueon’s product page leaves out its tank size, but the 2026 catalog rates it for aquariums up to 20 gallons. Aqueon doesn’t publish its watts or flow, so we don’t fill them in, and its page and catalog give different heights (6.4 and 5¼ in). Don’t swap in a QuietFlow model with a similar name.
Source: Aqueon 2026 Aquatic Product Catalog, page 27, read
Replacing an older model
Compare the current light choices or filter choices against your mounting and service space. We only call a model discontinued when its maker says so.
Not sure which model you have, or what state it’s in? Go through the used-equipment checks before you plug it in.