Jaco, when I started my tank no one used a sump, there was no such thing so my tank does not use one.
It had a regular UG filter in it at first but in a year it clogged and I almost lost everything so over the years I learned to run it in reverse and very slow. I only cleaned it fairly well twice, the first time after about 15 years.
To maintain it I just stir the gravel with a diatom filter and suck out the debris.
I know stores have to make money to stay in business but the only thing I ever bought besides most of the livestock was the tank itself and the powerheads which are all over 15 years old. Some are 20. I was going to build the tank myself but it was much cheaper to buy it ready made. My 6' long tank was considered very large then. Today it is not considered large at all. I can not get a larger tank because I installed it behind a wall and built much of the house around it.
The rocks I collected while diving in the tropics and the rest I built. I just like building things.
I don't have any test kits now but I did use them for years. There is no point any more. I can tell by the looks of the animals exactly what the readings would be.
This "hobby" is not rocket science but it can be as complicated and expensive as you want. I am a DIYer. I can afford to buy whatever I need but I prefer to build it as part of my hobby.
For instance, my 5' homemade venturi skimmer cost me about $10.00 to build not counting the two pumps it requires to operate. I could buy one but I don't think it would be as efficient or fit on my tank as well as this one. I think it is about 20 years old and requires almost no maintenance.
Besides part of my "hobby" is working on things for the tank. My lights are left over from lighting up the Plaza Hotel in Manhattan. I did that job and had some MH lights left over.
The stand is home made as is the chiller and auto top off. There is even a leak detector under the tank that will shut off the pumps to the skimmer in case of a leak or if the skimmer resavour fills too much.
Being there is no sump this is the overflow skimmer that skims the surface of the water and sends that to the protein skimmer. It site behind the rock in a corner.
There are no moving parts and it has worked flawlessly for decades, cost zero
You can see the Plaza Hotel lights here. The white thing in the rear of the tank is the algae trough.
The girl is my wife, she is zapping majanos. The only thing she likes to do with the tank.
The blue bucket suspended from the ceiling in my workshop in my basement is the freshwater sump for top off water. It is higher then my tank so the water can flow from there, through that black tube, over the ceiling to a float valve on my tank.
The smaller acrylic container to the left of it is the DI resins. And the RO is below it. There is a homamade float valve in the bucket that shuts off the water to the RO when the bucket is full.
This is about 25 feet away from my tank in another room.
It is all automatic and requires no maintenance except for changing resins once a year or so.
The small container on the small local animal tank is a shrimp hatchery that seperates the eggs from the shrimp and the white long thing is an older model worm keeper.