Hi everyone! I'm a first-time fishkeeper and would really appreciate some advice about my betta's fins.
I've had him for almost 3 weeks now, and I've noticed these tiny transparent, pinhole-like spots on his tail. They're not really holes, more like little areas where the fin membrane looks see-through.
He actually already had some of these spots at the pet shop, but they weren't very noticeable under the store lighting. I noticed them properly once I brought him home. Since then, I feel like there might be more of them, although the edges of his fins don't seem to be getting noticeably worse.
Some background:
- He's currently housed alone in a 30L planted aquarium (30 × 30 × 35 cm), with a filter and heater.
- The tank was cycled before I introduced him, and ammonia and nitrite were both at 0 ppm.
- Idid have some nitrite spikes about a week ago, which I addressed with daily water changes (sometimes twice a day, depending on the readings) and Seachem Prime.
- I've checked the decorations and haven't found anything sharp that could tear his fins.
- The filter flow seems gentle and doesn't appear to bother him.
- He's otherwise behaving completely normally, swimming around, exploring, and eating well.
I've added catappa leaves and ordered Seachem StressGuard, which I'm currently waiting for.
I know my current aquarium is a little on the taller side, so I've also recently bought a second aquarium that's only 25 cm tall. I'm considering moving him there once it's fully cycled, as I figured a shallower tank might be more comfortable for him with his long fins. I'm not planning to rush the move, though.
I've also been considering salt baths using pure, additive-free salt since I don't have access to aquarium salt, but I haven't tried anything yet because I'm unsure whether it would actually help or just cause unnecessary stress.
I'm mainly wondering whether these transparent spots could be early fin rot, physical damage, or something else. What confuses me is that the outer edges of his fins seem relatively stable, but the transparent areas within the fin appear to be increasing.
I’d really appreciate any advice or experiences with something similar. Thank you! 🫶