I have 5 zebra danios and 5 neon tetras in a 10 gallon tank..... which means 10 small fish in a 10 gallon tank. My filter is a "Penn-Plax Cascade 100 power filter" (See filter here) that pumps 100 gallons per hour.

I do a 50-70% water change every other week. Is this enough?

lol that is good, tropical fish, the thumb up rule is 1 inch = 1 gallon. I think you are doing a great job.

That sounds good to me. I have 16 tropicals in a 20 gallon and do about a 30% water change every other week. They don't produce too much waste and with a good filter water changes don't have to be that frequent, plants really help too

Thanks! Sounds good to me!