Mono Argentus 6 Pack
The Mono Argentus, also known as a Mono or Fingerfish, originates from the coastal and inland waters of Africa and Asia. This fish has a diamond-shaped body, silver coloration, and two black stripes on the front half. The dorsal fin features a yellow tint with a black outline.
The Mono Argentus grows large and requires a minimum 50-gallon aquarium. Smaller individuals can be kept in freshwater, but as they mature, the water salinity should be gradually increased to brackish conditions. A substrate of aragonite sand or gravel is recommended. Include brackish water-friendly plants and rocks in the tank.
| Specifications | Details |
|---|---|
| Species | Mono Argentus |
| Quantity | 6 fish |
| Water Type | Starts in freshwater, transitions to brackish |
| Minimum Tank Size | 50 gallons |
| Substrate | Aragonite sand or gravel |
| Temperature Range | 72°F to 82°F |
FAQ
What is the recommended water salinity for Mono Argentus as they grow?
The water salinity should be gradually increased from freshwater to brackish as the fish mature.
What type of substrate is best for Mono Argentus?
Aragonite sand or gravel is preferred for the substrate.
Do Mono Argentus require specific plants or decorations?
Yes, include brackish water-friendly plants and rocks to provide shelter and natural environment.

Luke Sharp –
The 6-pack arrived quickly and the fish were healthy when received. I started with a 50-gallon tank and gradually increased salinity over several weeks. The fish are active and have adapted well to the brackish conditions. I added aragonite sand and some Java fern, which they seem to enjoy.
Isaac Lambert –
I kept the fish in a 50-gallon tank with a mix of rocks and plants. After a few weeks, I noticed the fish began to swim more actively and the black stripes on their bodies became more defined. The transition to brackish water took about 6 weeks, and the fish are now thriving.
Stephanie Dowd –
The Mono Argentus are beautiful and quite striking. I followed the instructions for salinity change and used aragonite substrate. The fish are peaceful and don’t compete for space. I’ve included a few live plants, and they seem to coexist well.