Yes, both filter and heater are made for 5/5.5 gallon tanks. With a way to test Ammonia, Nitrites and Nitrates you are ready to cycle the tank to make it safe
CYCLING: the two-sentence tutorial
PetCo sells Aqueon tanks so you would need an Aqueon glass canopy or whatever lid you decide to buy. PetSmart sells Marineland so you'd need a Marineland hood. They're both the same number of gallons but vary just enough in dimensions that a Marineland won't fit an Aqueon and vice versa.
IMO, as you have the heater and filter, these are the "musts":
1. SeaChem Prime (makes water safe)
2. Regular weekly water changes (two gallons) with vacuum. This tells you why:
Symptoms and Diseases Triggered by Poor Habitat Maintenance
3. NorthFin Betta Bits, Fluval Bug Bites, Omega One, New Life Spectrum. The best food is
Grain Free Bug (Black Soldier Fly) Formula. However, you must order online. It has absolutely no fillers. Site also sells live plants.
4. API Master Test Kit
5. Indian Almond Leaves or plain, decaffeinated Rooibos Tea. Both have antibacterial and antifungal properties and will help prevent both.
If you take care of all of the above then in order of importance (IMO):
1. Lots of plants (silk or live). As as noted, live Anubias or Java Fern can be left floating or tied to decor. Only the roots can be planted. I have more success with Anubias. Best Betta tanks have 50%-75% plants. Rule of thumb: If you can see a Betta at a glance there aren't enough plants.
2. Hides if you don't have enough plants. I use pieces of slate propped against a tank wall. Cheap and effective. You can get a piece of slate at Home Depot or Lowe's....if small enough they will give them to you.
3. Algae scraper
4. If you have live plants:
https://www.nilocg.com/ If you ever have plants that grow in substrate then substrate fertilizer tabs. If you only have floating plants then the above is, IME, the best. Comes with a pump so there's no measuring. I didn't think my plants could do any better until I tried Thrive.
5. Some keep meds on hand; but if you keep up with water changes and use Indian Almond leaves you shouldn't have any need for them. Only you know if you will do regular maintenance and IAL. If you think it might be haphazard, then the meds recommended could become necessary. Keeping the water clean is cheaper and less stressful.
If a Betta with a healthy appetite stops eating and becomes lethargic, post in the Diseases and Emergencies sub-forum. Fill out the sticky
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