I have a delta tail male betta that I've yet to name in a two gallon tank. I'm going to upgrade him to a five gallon in the next few weeks and had a few questions.
First, sand. I've heard mixed stories on sand with bettas. I've heard that they're perfectly fine with it and others that they eat it and die. I would like to put sand in the new tank with a piece of wood and some Indian almond leaves, but I don't want to inadvertently cause my bettas problems. Your thoughts and opinions?
Second, to filter or not to filter. If I put a filter in the tank it'll be a sponge filter, but I wonder if the tank will be okay without a filter? I do water changes on the weekends and the tank will have a heater.
Third, name suggestions for the betta?
I use Black diamond 'sand' in all my betta tanks, and my husband has regular white aquarium sand in his betta's tank. There have been no issues with any fish here eating sand. My suspicion as to why a betta would eat sand would bee under feeding and they are looking for food or they are fed improperly and all food sinks so they have to eat off the bottom.
When using driftwood please know that bettas have extremely delicate fins that easily shred. Best thing to do is get 1: nylon stocking (can get cheap at grocery store or dollar store) and 2 wet-dry sandpaper. Rub the nylon stocking over every inch at every angle of the wood you intend to use. If if slightly snags or full blow rips that part will sherd a bettas fin. Go at it with the sand paper (wet-dry lets you rinse the wood off and repeat as needed without gumming up the paper(would happen with regular sand paper)). Get the whole thing sanded down and smooth, be mindful of long tips/branch-y ends as long fins can snag on those too. Now I'm not saying you can't do driftwood. I have it in a few of my tanks but I took the hour+ to make it betta safe.
When using IAL (Indian almond leave) you need to be aware of your tap's pH and hardness (buffers pH). Unless you have 'liquid rock' aka extremely hard water adding 1-2 whole leaves can plummet pH pretty quick. While bettas do tolerate a wide range of pH, no fish likes drastic swings. I'd advise adding 1/3-1/2 of a leaf at a time, give it a few days to start leeching and see how it effects pH before adding more. Be mindful when dong water changes of this pH difference and consider aging water out for a few days with a bit of IAL to get its pH to tank's pH.
Filter:always a good idea! While bettas might survive without one they are much more comfortable, active, and healthy with a filter (and heater ^^), a cycled tank is always better. Even in a planted tank ammonia builds up during 'lights off' as plants only absorb ammonia when they can photosynthesize. F
Best/easiest solution is a sponge filter run on an air pump (7 of my 9 bettas have sponge filters). I recommend Jardin brand sponge files (on amazon) as they are a soft sponge material.. I'd bought a different brand that had such a rough sponge it was not betta safe (failed the nylon test), so I had to wrap it in a shower scrunchie to protect the fish's fins.
But bettas don't do well with strong flow, if you want to use an HOB you need to stick with very low GPH. Azoo palm(also called Azoo Mignon) is used by a lot of betta owners, and its the filter on my husband's 5.5g betta tank, as far as HOB's go for small tanks I'd recommend it! I like that it comes with a pre-filter sponge to slip over the intake. I find that little add on is a must with hob, canister, or internal filters-the intake slots can suck fins n and rip them as the betta fulls away. Making a simple filter foam 'sock' to slip over circular intakes or cutting and tieing a strip of foam to internal filter intakes is highly recommended to save betta fins. If you use an hob you may also need a piece of foam stuffed into the outflow to reduce current depending on GPH. If you use an internal filter or canister I suggest using a spray bar for the outflow to disperse current so its not too strong (you can aim the spray bar holes against the wall the bar is agaisnt so water bounces off the closest wall and them spreads around the tank)
Some other filter options used and recommend by other betta owners (on a bettafish specific forum):
Amazon.com : Jardin Aquarium Fish Tank Mini Biochemical Sponge Filter : Pet Supplies
Amazon.com : Jardin Fish Tank 4 Layer Sponge Biochemical Water Corner Filter : Aquarium Filters : Pet Supplies
Aquarium Internal Filter IF-201
Aquarium Hang on Filter PFE-1 - 15 Gal Capacity, 45 GPH, 2W
There are some small gph HOBs on e-bay too but cannot link them here. You can also use aquaclear's smallest HOB but you will have to do the sponge /foam over the intake outflow and keep it on the lowest setting.
Note: if you have foam over the intake it will clog with time and need periodically rung out. Turn off filter during water change and take off foam to squeeze in removed tank water then put back on and start filter again. How often you have to do this depends on stock (if you add a snail9s) it will clog faster with poop), and uneaten food/dead plant matter left in the tank.