Red Sea Reefer Peninsula 350 G2+ System (73 Gal) fit check
Red Sea Reefer Peninsula 350 G2+ System (73 Gal) is a 73-gallon sumped reef ready. It ships with a stand, a sump or rear filtration, and ATO; plan separately for return pump, lighting, and skimmer. At that volume ReefCrafter's math points to 185-365W of heating and about 2,190 GPH of mixed-reef flow.
Red Sea Reefer Peninsula 350 G2+ System (73 Gal): fits roughly 73 gallon systems. Specs, compatibility math, sizing risks, and alternatives before you buy.

Who it is for
Good fit for
- ✓ Keepers who want filtration space built in rather than plumbed later.
Not a fit for
- ✕ Buyers expecting a complete kit; it still needs return pump, lighting, and skimmer.
- ✕ Tangs and other open-water fish that need 75+ gallon swimming room.
Listed features
- rimless peninsula
- dual viewing sides
- cabinet and sump included
- ReefATO+
Compatibility math
Downstream requirements
Example: 73g points to about 185-365W of heat and 2,190 GPH mixed-reef flow.
The tank is the constraint every other component has to satisfy.
Risk notes
- A tank can look affordable until you account for the light spread, skimmer room, stand access, and upgrade path it forces.
- Price is marked as estimated, so verify current vendor pricing before treating the budget as final.
Professional fit context
- Check display volume, total volume, footprint, included sump/stand, and what equipment is still missing.
- Red Sea Reefer Peninsula 350 G2+ System (73 Gal) fits roughly 73 gallon systems; confirm that range against the final display volume, sump volume, and livestock plan.
- Treat the displayed price as a budget placeholder until a reviewed vendor page confirms current pricing.
Alternatives to compare
- Red Sea Reefer 350 G2+ System (72 Gal)
72 gallons vs 73: a smaller display.
- Waterbox INFINIA Frag 125.4 Aquarium System (78 gallons)
78 gallons vs 73: a larger display.
- Waterbox MARINE X 110.4 Aquarium System (79 gallons)
79 gallons vs 73: a larger display.
Livestock this affects
- Engineer goby
55+ gallon minimum; fits this 73-gallon display.
- Melanurus wrasse
55+ gallon minimum; fits this 73-gallon display.
- Diamond watchman goby
50+ gallon minimum; fits this 73-gallon display.
- Green mandarin dragonet
Needs 75+ gallons; too large for this tank.
Full spec snapshot
- Category
- Tanks
- Build tier
- Balanced
- Estimated price
- $2,899 est.
- Tank fit range
- fits roughly 73 gallon systems
- Format
- Sumped Reef Ready
- Display volume
- 73 gal
Related reading
Questions
What equipment comes with the Red Sea Reefer Peninsula 350 G2+ System (73 Gal)?
The catalog lists a stand, a sump or rear filtration, and ATO as included. You still need return pump, lighting, skimmer, and flow pumps.
What size heater does the Red Sea Reefer Peninsula 350 G2+ System (73 Gal) need?
At 73 display gallons, ReefCrafter's 2.5-5 W per gallon band gives 185-365W, ideally split across two heaters of about 95W.
What tank size is the Red Sea Reefer Peninsula 350 G2+ System (73 Gal) for?
ReefCrafter's catalog fit range for it is 73 gallon systems. Confirm that against your final display volume, sump volume, and livestock plan rather than the box label alone.
What should I compare the Red Sea Reefer Peninsula 350 G2+ System (73 Gal) against?
Red Sea Reefer 350 G2+ System (72 Gal) (72 gallons vs 73: a smaller display); Waterbox INFINIA Frag 125.4 Aquarium System (78 gallons) (78 gallons vs 73: a larger display); Waterbox MARINE X 110.4 Aquarium System (79 gallons) (79 gallons vs 73: a larger display).
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