Betta has sluggish behavior. PH too high?? More decor?? (VIDEO)

[vundercoverdog]

So that is my halfmoon betta benjamin. He's pretty lazy and sluggish. During the day he mostly hangs around the bottom of the tank. In the video he's more active cause i was there. I use to have a red viel tail betta that was bright red, active and always had his fins out. I knew he was happy cause he never stopped building bubble. nest. This one? None. Zero. Zip. What do you think is wrong? THe water parameters are: Ammonia- 0ppm Nitrate: 0ppm Nitrite: 0ppm and PH: 7.8. The week before i added some aquarium salt to kill any parasites or microbacteria. The temp is a solid 80 F. I feed him hikari food pellets. I change 10% of the water by vacuuming. The other 10% evaporates so i add 2 gals every change. Filter change every 2 weeks. Any advise? should i add more plants or decor. Also i would like to improve the color of my plants should i buy some eco complete or fluorite as substrate? Thanks in advance. The plant i have no is a sword.


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[tarpon]

There's no need to change the filter every 2 weeks. If you're not seeding the new one you're causing your fish lots of stress by removing all the beneficial bacteria. A filter pad can last 6 months to a year. You just need to swish it around in the water you siphoned out to clean it