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Deleted member 149562
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Now I am going to take a little exception to the theory of "is 25 litres enough for a Betta" argument25 gallons is PLENTY big for a betta... But not 25 liters. That translates to 6 gallons which is basically a 5 gallon tank... The minimum for a betta. On top of that, its a tall tank, so there is not a lot of horizontal swim space. Its just not a good fit for any fish really... I would stick with shrimps and snails
Whilst I absolutely agree that bigger is better for a Betta, I also feel that we are forgetting one small detail here.
When you have more finnage & tail than your body, the last thing you need to be swimming in is an ocean of water.
Short finned & tailed Betta can handle vast quantities of water with ease since they have nothing to inhibit their movement or swimming ability.
But the big finned and tailed Betta cannot handle that situation so well, they get tired, they get stressed out and it probably shortens their lifespan a little bit too having to heave all that finnage & tail around....it is one of the reasons so many Betta become tailbiters, afterall.
I agree that a Betta should be in an aquarium no smaller than 5 gallons (which the 25-30 litre fits snuggly into that size) but at the same time you should also take into consideration the finnage and tail and how it will impact the ability to swim around the aquarium and, most importantly, how it manages to surface breathe without a struggle to get there.
The Betta is unique in that you should not only consider the volume of water but whether or not the fish can actually cope with living in that volume of water. And the big finned & tailed simply struggle when in more water.