I've been in the hobby continually since I was about 7 years old, back when I had goldfish with tropicals and super-stocked tanks. It's a wonder they never crashed! So, now, that would be about 10 years time. However, I have been seriously fishkeeping for about 4 years (2 if you don't count my less able times before Aquaria Central helped me out). At my peak, I had 7 tanks. Now I have 5 tanks, and am shrinking down to 3 tanks (75, 20L, 20T).