Will this work for a 26 gallon Bow Front Aquarium?

26 gallons is not large enough for all of them. Your female betta gets two and a half inches your glowlight tetra's get to be about an inch and a half a piece and your Kuhli Loaches get to be 3-5 inches. Now with your glowlight tetra's you're stocked to 13.5 gallons with your Loaches you're stocked to 22.5 if they all stay at 3 inches and overstocked at 28.5 if they reach 5 inches. And with your female Betta this completely stocks you at 25 gallons if your loaches are 3 inches and overstocks you at 31 gallons if y our loaches get 5 inches. You cannot add anymore fish to this tank.