I get ur frustration
this hobby is constant uphill battle because we are trying to recreate a natural environment in a box.
we put in all the hard work for moments of success. Lol
there are not many equipments u need imho.
Two things I feel are must (besides the obviously lights, pump, power head) are 1) skimmer and 2) uv sterilizer.
these two items are necessary for overall healthy environment of the tank.
Fish and in
Uv really helps with most algae, too.
don’t get a cheap uv sterilizer.
get one powerful enough with ur pump gph
For reference, I am using aqua uv classic 25w for my 50 gallon DT plus sump @ around 500gph.
good luck!