Penn Plax Betta Fish Tanks | Petco

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Vet Q & A
What's the best tank size and setup for a happy, healthy betta?
A 2.5 gallon tank is fine for a Betta and 2 snails. If you have artificial plants, use ones made of silk instead of plastic which can harm delicate fins. You'll need a heater also. Bettas are tropical fish and do best between 78 F and 80 F.
Updated on September 24th, 2025
Training & Behavior
How to safely introduce betta fish to neon tetras and guppies?
Betta are definitively very territorial and you may notice multiple fights for space at the beginning. Definitively the aquarium must have multiple spots for hiding like Terra Cotta Flowerpots and PVC Piping, moss or bushy plants, ornaments, rocks and driftwoods. This will avoid open fights and will provide good places to have some rest.
Updated on September 24th, 2025
Vet Q & A
What fish or other tank mates are best for a betta in a 3-gallon tank?
Most of the compatible fish are schooling fish that do best in groups of 4-8. This would include Neon Tetras, Ember Tetras, Harlequin Rasboras or White Cloud Minnows. That many fish may be too much for a 3 gallon tank. Other non-fish option include Ghost Shrimp, Zebra Snails or African Dwarf Frogs.
Updated on September 24th, 2025
Vet Q & A
What fish can I put with my male betta? Are they good tank mates?
It is very difficult to see the markings of these fish from the pictures. Many fish may be able to live with a Betta if there is a large enough tank. Here are some guidelines on how to pick tabkmates for a Betta. No nibblers – if a fish nibbles at a Betta fish they will get bit back! Bigger fish and colorful fish could be seen to be intimidating – you don’t want to intimidate a fighting fish! Think of the size of your aquarium – you should always have 5 gallons of personal water space for your betta fish Many bottom feeders* are fish that can live with bettas Remember the dietary requirements for both tank mates Add a few tank ornaments and live plants for any intimidated fish to hide (just incase) You can find some more info here. http://www.drsfostersmith.com/pic/category_home.cfm?acatid=158
Updated on September 24th, 2025
Vet Q & A
What fish can I put in a 3-gallon tank, and how to change water?
The small size will limit the species of fish as well as the number. White Cloud Minnows or Guppies would do fine in a small tank. You could keep no more than 2 or 3 fish total. If you are looking for company for your Betta, the same species can be kept. Other options include Otocinclus (Otos), Corys, Platys or Harlequin Rasboras. Again, no more than one or two in addition to the Betta. Water changes for any tank are simple. Change no more than 30% total volume at a time. Use a water conditioner to remove harmful chemicals and make sure the water is temperature matched to prevent stress or shock. Rinse the filter in tank water, not tap water, to preserve beneficial bacteria. Vacuum the substrate every couple of weeks.
Updated on September 24th, 2025