The friendliest place on the web for anyone with an interest in aquariums or fish keeping!
If you have answers, please help by responding to the unanswered posts.
High tech tank usually have higher lighting (3+ wpg and T5HOs). They also have CO2 injections. Another element is the substance which is usually a higher quality plant substance.
Low tech-basic plants and low lighting, not CO2 and maybe a little nicer substance.