Setting up a breeding space for my Angel pair before they destroy the main tank terrorizing everyone. I chose a 26 gallon bow because it is higher than a 20, but not too big for a sponge filter to manage. I am using 30lbs black Tahitian moon sand with aproximately 10lbs of eco complete substrate. I built a landscape with deep extract at the back, an angled 6" terra cotta pot, mopani wood and slate. See pictures***. I will add live plants tomorrow. PH 6.8 KH 5 GH 9 Using Seachem stability, Prime, Flourish Excel and Kent black water extract. Running a 55 gallona Huijikon double sponge filter with an oversized air pump. My questions are: what temperature should I set the heater? Do you think the sponge filter will be able to keep up with waste and create adequate water movement?