Our take
Penn-Plax model WW3D1 is a verified aquarium model lead: the 2025 wholesale catalogue names a Water World 3D Serenity desktop aquarium, lists 0.75 gallon, and supplies UPC 30172071157. That is enough to distinguish the model from other Penn-Plax desktop tanks, but it does not settle what the historical three-theme Amazon title included. Treat this as a compact model reference, not a promise about a complete kit or a recommendation for any particular animal.
A buyer checking a very small named desktop aquarium model who can verify the complete current package and suitability for the intended setup..
Not for a buyer who needs confirmed dimensions, a specified tank material, a known filter or light, or evidence that a particular livestock plan is suitable for a 0.75-gallon vessel.
Pros & cons
What could work for you, and what to consider before buying.
What works in its favor
- The 2025 catalogue directly lists Penn-Plax model WW3D1 by name.
- A source-listed 0.75-gallon capacity gives a concrete sub-gallon size class.
- The catalogue also supplies UPC 30172071157 as a second identity check.
- The exact model code separates it from nearby Penn-Plax desktop aquarium models.
What to weigh up
- The source does not state material, outside dimensions, lid design, or tank construction.
- Filtration, lighting, included decorations, and the frozen three-theme wording are not confirmed.
- The historic ASIN is not verified as a current exact Amazon offer.
The key details
| Model covered | WW3D1 |
|---|---|
| Listed Capacity | 0.75 gal listed |
| Tank Construction | Tank construction not documented |
| Documented Package Feature | Desktop aquarium; included equipment not documented |
Performance figures are manufacturer claims. Source checked October 10, 2026. Regional models and included accessories can differ.
What the features mean for you
What WW3D1 identifies
The useful evidence is unusually specific for a historical desktop model. A 2025 wholesale catalogue places WW3D1 in Penn-Plax's desktop aquarium kits and identifies it as a Water World 3D Serenity Desktop Aquarium. The same row lists 0.75 gallon and UPC 30172071157. This makes the model code and barcode useful checks when a retailer uses a shortened name. The frozen source title says three themes, but the wholesale row does not say which backgrounds or decorative panels are included. I therefore keep the catalogue name and preserve the title difference instead of treating the package wording as settled.
How the listed capacity changes the comparison
At three quarters of a gallon, WW3D1 belongs at the very small end of this aquarium comparison. The catalogue provides no footprint or height, so its capacity cannot tell you whether it fits a particular desk, shelf, or cabinet. Nor does a small nominal figure establish how much water remains after equipment or decoration is installed. A buyer considering this model should first confirm dimensions and the intended setup, then decide whether that scale is practical for routine water care. This review does not make a livestock suitability claim from the capacity alone.
Do not fill the equipment gaps with assumptions
The wholesale entry does not identify a filter, pump, heater, light, lid, or power supply. Its placement in a desktop aquarium-kit section is not a detailed box list. It also does not describe the tank material or explain the 3D theme system from the older source title. A seller may offer a package that differs from the catalog's base description, so check the current item code, UPC, photographs, and included-parts list before adding equipment or budgeting for a ready-to-run setup. Unknown equipment stays unknown here; it is not evidence that a component is absent.
Compare it with other Penn-Plax desktop models
The exact WW3D1 code matters because Penn-Plax has other small desktop models in the same wholesale table. The Prism WW120B is listed at two gallons and names a light, while the Radius WW111K is listed at five gallons with an internal filter and LED. Those are separate models with larger listed capacities and documented package details that WW3D1's row does not provide. The 1.13-gallon BBT3 double-tank kit and the SpongeBob SBK108 also have their own product identities in this guide. Similar branding or desktop size does not make their specifications transferable to WW3D1.
Verify the exact offer before buying
The Amazon destination is a tagged search for WW3D1, not a direct product page, because the frozen ASIN has not been cross-referenced to a current exact offer. Search results can mix vintage and unrelated desktop tanks. Compare the printed model and UPC with the catalogue identity, and ask the seller to confirm the capacity, tank material, dimensions, theme pieces, and electrical contents for the unit that would ship. No current price, inventory, warranty, or seller-specific package has been established by the saved research. If the code differs, treat it as another product until evidence connects it.
What else to compare
For a larger Penn-Plax desktop aquarium with documented equipment in the same wholesale catalog, compare the two-gallon Prism WW120B with its listed light or the five-gallon Radius WW111K with its internal filter and LED. Those facts belong to those separate models and must not be assigned to WW3D1.
Before you buy
What capacity does the catalogue list for WW3D1?
The 2025 wholesale catalogue lists the Water World 3D Serenity Desktop Aquarium at 0.75 gallon. It does not provide a measured usable-water volume.
Does WW3D1 include the three themes in the frozen title?
The frozen title says three themes, but the exact-model wholesale row does not itemize them. Confirm the current seller's included parts.
Does the catalogue establish a filter or light?
No. The WW3D1 row does not list filtration, lighting, dimensions, or tank material.
Why does the Amazon link open a search?
The historical ASIN has not been verified as a current exact offer. Search by WW3D1 and compare the model code and UPC before purchasing.
Where can I check the current price?
Use the Amazon link for current offers. Check the exact model, seller, product condition, delivery, and return terms. This page does not display a live price or confirm stock.
Sources & review basis
We use the following manufacturer documentation for the product features above. Our suitability notes and buying advice are editorial judgments based on those features, not measured performance results.
- Cichlid Wholesale Catalogue 2025, Penn Plax desktop aquarium table, WW3D1 ↗ — checked October 10, 2026.
- Cichlid Wholesale Catalogue 2025, page 3, lines 694–710; WW3D1, Water World 3D Serenity Desktop Aquarium, 0.75 gallon and UPC 30172071157 ↗ — checked October 10, 2026.
The decision
WW3D1 is a named 0.75-gallon desktop aquarium model with a catalogue-listed UPC, but nearly all fit and package details remain unresolved. Choose it only after the actual seller confirms the model, dimensions, material, theme components, and equipment. The source-row ASIN and three-theme phrasing remain clues rather than current-offer proof.
Is it the right fit?
Check the exact model and today’s offers on Amazon.