WEEK AQUA S Series RGB+UV Review: Is This the Only Light Your Planted Tank Will Ever Need?

The WEEK AQUA S Series is an app-controlled RGB+UV aquarium light built to fix a specific, common problem: red and purple stem plants like Rotala and Ludwigia fading to dull olive green under standard lighting. Dedicated UVA beads alongside the RGB channels push those plants to produce visible red and purple pigment, while Bluetooth app control handles spectrum, dimming, and a sunrise/sunset ramp without a separate timer. For nano and mid-sized planted tanks, it's a real step up from a basic clip-on light without the full high-tech price tag.

We've all felt that specific aquascaping heartbreak. You buy a bundle of vibrant, fire-engine red Rotala or Ludwigia, plant it carefully, turn on your standard aquarium light, and wait. Two weeks later, that gorgeous crimson stem has turned dull, muddy olive green. It's not your fertilizer schedule, and you probably didn't get sold the wrong plant. You just don't have the right light spectrum.

Why Dedicated UV Actually Matters

Close-up macro photography of intense red and purple Ludwigia and Rotala aquarium stem plants thriving under dedicated UVA wavelength LED lighting.

Standard RGB lights mix red, green, and blue LEDs for a bright, crisp viewing experience — solid for basic growth, but not enough to trigger real pigmentation. The S Series adds dedicated UVA beads alongside the RGB channels specifically to change that.

The mechanism: when stem plants like Alternanthera reineckii get hit with UVA, they produce protective red and purple pigments to shield themselves — not unlike how skin tans under UV exposure. Under this light, reds visibly deepen, greens look richer, and the washed-out yellowish tint typical of budget fixtures disappears.

Total App Control, No Remote to Lose

Aquarist using the WEEK AQUA Bluetooth smartphone app to customize RGB and UV spectrum channels and program sunrise sunset timers for a planted aquarium.

Losing a tiny plastic remote in the couch cushions is a rite of passage in this hobby. The S Series runs entirely through Bluetooth via the WEEK AQUA app — no WiFi required.

Feature	What It Does
Independent RGB + UV channels	Dial each color and UV intensity separately, 0–100%
5 preset modes	Quick presets including red grass, green grass, and mixed spectrum
Sunrise/sunset ramp	Lights fade in and out gradually instead of switching on instantly
Built-in timing cycles	6, 8, or 10-hour photoperiods — no separate timer needed
Tank grouping	Name and manage multiple fixtures from one app

Want a moody, high-contrast look? Turn down green, bump up red and UV. Want bright daylight instead? Run all channels evenly. The sunrise/sunset ramp also means your fish wake up to gradually increasing light instead of an instant blast the moment the timer hits.

Built for Real Aquascapes, Not Just Nano Cubes

Modern living room featuring a large high-tech planted aquarium illuminated by the sleek, adjustable WEEK AQUA S Series RGB+UV LED light fixture.

A common frustration with clip-on lights is that they're completely static — a tall piece of driftwood or a dim back corner is just out of luck. The S Series bracket slides up and down the arm to adjust intensity at the substrate, and the light body rotates to aim exactly where your highest-demand background plants sit, without repositioning the whole fixture from the couch.

Setting It Up Without Triggering an Algae Bloom

Close-up detail of the robust black aluminum rim clamp and adjustable mounting bracket of the WEEK AQUA S Series LED aquarium light secured to rimless glass.

Don't run new lighting at full intensity on day one. Jumping straight to maximum RGB and UV on a tank used to a basic fixture is a fast track to an algae bloom, since your plants and biofilm haven't adjusted yet. Start around 50–60% and increase gradually over several weeks while watching for early algae signs — the same ramp-up that applies to any lighting upgrade, not just this one.

Before buying, check your tank's exact footprint and rim thickness against the listing on PlantedPro — clip-style mounts have real limits on glass or rim thickness, and a bad fit is the most common return reason for lights in this category.

FAQ

(Q) Do I need WiFi to use the WEEK AQUA app?

A. No. The light connects directly to your smartphone over Bluetooth — open the app near your tank and it finds the fixture automatically.

(Q) Is the UV light safe for fish and shrimp?

A. Yes. These fixtures use UVA, the same lower-energy UV range found in ordinary daylight — not UVC, the sterilizing wavelength used in filters and quarantine equipment. UVA at these levels is standard in planted-tank lighting and safe for livestock and invertebrates.

(Q) Will this light grow demanding carpet plants like Monte Carlo?

A. It depends on tank depth and how close you position the fixture — check the PAR output on the listing for your specific tank size before committing, especially for high-demand carpeting species that need strong light at the substrate.

(Q) Does more UV always mean better plant color?

A. No. Excess intensity without acclimation feeds algae faster than it improves color. Ramp up gradually and let plants adjust before pushing UV and RGB toward maximum.

Pristine, algae-free planted nano aquarium with lush green carpeting plants, healthy moss, and driftwood thriving under the WEEK AQUA S Series RGB+UV light.

If your reds keep fading to green no matter what you dose, the light is usually the missing piece, not the fertilizer. Check out the WEEK AQUA S Series at PlantedPro and see the difference dedicated UV makes on your next trim.