Advice:After 20 years of doing this, I've learned that if you ask 100 people what the best way of doing something is (filtration, lighting, water chemistry, ect) you'll get 100 different answers...and they might all be correct
Plan your project before you start, have a vision for your tank and be patient. The final product might take months to achieve. Mistakes can be expensive, but don't give up. Read, read, and read about the fish you want to keep and their natural biotope. Cichlid tanks can, and probably should, be "over-populated" to dilute their natural aggression. Everyone gets chased equally.
IMHO, frequent water changes, particularly in a large aquarium, are overrated once a clean tank is established. I only add water to top off the tank, and rarely do significant water changes. My water chemistry stays stable with no detectable nitrates and my fish are breeding.
Filtration is the key, but whether you use biologic, chemical, mechanical, or whatever combination thereof does not matter as long as you have enough flow to maintain a stable system.
Algae in an aquarium is an inevitability. Algae control is the name of the game. Get it to grow where you want, ie out of site, and not where you don't. Nerite snails are the best (even if you have a live planted tank--they don't eat anything but algae). In my tank, I allow a constant algae bloom in my refugium. My LED up top is excellent for fish viewing, but not so much that it fuels algae growth in my deeper tank.
About Yourself:Hello Guys, thank you for voting!!! I started with a Betta a few years ago on my office desk, LOL. I knew nothing about fish keeping when I started. I went and purchased a 30 gallon freshwater tank and all the starter stuff, I enjoyed community tank environments which lead to add a 90 gal aquarium next. Another thing was dealing with independent fish stores (not big box for advice) and talking with the owners they helped me add compatible mates because this reduces aggression and my sanity. All my fish are aggressive and you have to be willing to remove a tank mate if they are not fitting in (exchange it or give it away after trying to isolating it for a couple days in a hang on plastic jail). I found the larger the tank the easier it was to maintain the water condition, less swings and this made the whole experience more enjoyable for me. I took the plunge six months ago to add a built-in 220 gallon aquarium which is in the picture here, I love it!!! I do two 25% water changes every week because I like to feed my fish lots (2x?s a day) but with that comes the work of maintaining the chemistry and canister cleanings. I feed fresh in the morning and granules in the late afternoon to keep everyone happy. Note: I also started with hang on filters but found that when I would come home I could smell the fish; this was solved with installing a closed filtration system (Canister filtration) huge difference and well worth the money. I have learned lots from talking with long time fish people, reading and watching online. Have a great day, thanks again for your vote.