← Innovative Marine Nuvo Fusion Lagoon 25 · All nano protein skimmers
Best skimmers for the Innovative Marine Nuvo Fusion Lagoon 25
Choose a skimmer whose manufacturer-rated volume meets or exceeds your tank volume multiplied by a safety margin: 1.2× for light bioloads, 1.5× for medium, and 2.0× for heavy. This compensates for manufacturer overclaiming and the tendency to overstock nano tanks. If you're using an in-sump or in-chamber skimmer, confirm it physically fits the rear chamber, which is often only about 3 inches front-to-back; hang-on-back skimmers sidestep that constraint.
The Innovative Marine Nuvo Fusion Lagoon 25 is a low-profile, peninsula-style 25-gallon AIO with a long 23.6 in front pane, 19.7 in front-to-back depth, and just 11.8 in of height, in 8mm low-iron glass for an open aquascape. It ships without a light, so plan for a separate fixture. Community sources and the owner's manual put the rear chamber at roughly 8.7 in wide × 2.8 in front-to-back × 8.5 in tall, with that ~2.8 in depth the tight constraint for skimmers and pumps. The original Lagoon 25 ships with two adjustable 130 GPH DC return pumps (about 260 GPH combined); the later Pro revision uses a single MightyJet 326.
AquaMaxx HOB-1 $189.99
- rated to 75g, covers your 38g medium-bioload target (tank + margin)
- hangs on back — no chamber-fit constraint
All skimmers compared
| Skimmer | Rated to | Mount | Price | Verdict |
| AquaMaxx HOB-1 AquaMaxx | 75 gal | HOB | $189.99 | Top pick |
| Classic 100-HOB Skimmer Reef Octopus | 105 gal | HOB | $334.94 | Works, oversized |
| Comline DOC Skimmer 9004 Tunze | 66.1 gal | in-chamber | $199.99 | Likely — verify fit |
| Classic 110-INT In-Sump Skimmer Reef Octopus | 130 gal | in-chamber | $326.85 | Likely — verify fit |
| Comline DOC Skimmer 9001 Tunze | 37 gal | in-chamber | $149.99 | Undersized |
| K1-Nano Protein Skimmer IceCap | 30 gal | in-chamber | $98.16 | Undersized |
| Bubble Magus QQ1 Bubble Magus | 25 gal | HOB | $95.99 | Undersized |
| SkimMate Ghost Skimmer (Desktop) Innovative Marine | 20 gal | in-chamber | $149.99 | Undersized |
| Bubble Magus QQ2 Bubble Magus | 26 gal | in-chamber | $99.99 | Undersized |
FAQ
Do I need a protein skimmer on a nano AIO?
It depends on your bioload. Lightly stocked tanks with frequent water changes can often skip a skimmer, but a heavily stocked nano benefits significantly from one. If you're running a heavy bioload, size up to a 2× safety margin on the manufacturer's rated volume.
Why apply a safety margin to the manufacturer's rated volume?
Skimmer manufacturers tend to rate their products under ideal, lightly stocked conditions. Nano tanks are also easy to overstock relative to their water volume. Multiplying the tank volume by 1.2 to 2.0 depending on bioload gives you a buffer against both factors.
My AIO rear chamber is only 3 inches deep — what are my options?
In-chamber skimmers must fit that footprint, and many don't. Measure the front-to-back and left-to-right dimensions of your chamber before buying. A hang-on-back skimmer avoids the fit problem entirely since it mounts on the tank's back wall instead of sitting inside the chamber.