You have a medically certifiable case of MTS - Multiple Tank Syndrome :lol: It is easily treated by buying as many tanks as possible. Try pointing out to your partner that at least she knows where you are and you are staying home more often. Of course, if she actually wants you out of the house more you might have to consider building a fishroom at the bottom of the garden :lol:
How old is your daughter? Fish keeping is a great way to teach a child responsibility and is useful for older children as it provides lots of ideas for doing great Science Fair projects. A very educational hobby and well worth encouraging.
If a tank is set up correctly and balanced, filtration is not needed. Someone I know who has bred fish for over 60 years always told me he never used filtration.
May I suggest you remove the paua shells? Your pH is a tad too high 7.0 - 7.5 would be better but fish get used to different levels and if yours were trying to spawn they can't be too upset
I love the dwarf neon rainbows and have them myself. They look rather plain at first glance then you notice how they catch the light - beautiful!
I am sure Janey will look forward to hearing from you. The Kapi-Mana club is very active and social at the moment and members appear to have a lot of fun.