Luananeko
Aquarium Advice Addict
If you're doing 75% changes make sure you're adding your ferts and such for the plants at the same time you do the water change. You're effectively taking away all their food during the water change, so without ferts to compensate they'll struggle. I also recommend canister filters as mentioned by FreshObsessed. Once you've seen the space a canister has for filtration compared to a HOB filter, it's a little startling how much more efficient the cansiter is. If you plan on CO2 for your plants, a canister is better at not gassing out your CO2 as well. I love my Rena Filstar XP3 on my 75 gallon
It also might help if you add the betta and the gourami at the same time (assuming you have two floating chambers you can use), as this prevents either from getting a territory established before one or the other comes into the picture.
It also might help if you add the betta and the gourami at the same time (assuming you have two floating chambers you can use), as this prevents either from getting a territory established before one or the other comes into the picture.