I have three questions. :U
First, I have Robert in a heavily planted, filtered, heated five gallon tank with two otocinclus. Right now I do one 50-60% water change a week. So far I've had no problems. There are photos of the tank in my albums so that you can see how densely it's planted. I wonder if that is sufficient.
I also have four ADFs and two otocinclus in a (heavily planted, filtered, heated) ten gallon tank. My parents have been taking care of them while I've been away. I came back to visit this weekend to find that instead of the one 50% change per week that I've been telling them to do, they've been doing one 50% change per whenever the heck they feel like it, which is every "couple of weeks". They've also been using a vacuum cleaner hose to suck the water out and have been using containers that have been cleaned with soap and detergent. And they won't listen to me when I tell them to follow my instructions because "they look fine". What should I tell them, how can I get them to take me seriously? >:l
Lastly, mechanical gravel vacs are like 50$ and that's way out of my price range. I can never get the cheap plastic ones to work right, so I just use a turkey baster to the best of my ability to suck the grime out. Is that satisfactory?