one of the guys at work has a rule with regards to my fish keeping :
'your fish is not better than anyone elses fish, and any dog is better than your fish.'
Hes an old stubborn man and theres no amount of argument that will change his mind.
sucks to hear about the dogs. hard to believe that someone would just waltz up to the dogs to let them 'free', barking dogs are no reason to do that sort of thing
So can aluminum cans be used as tank decorations? the reason i ask is because i saw this on trademe.
http://www.trademe.co.nz/Pets-animals/Fish/Fish/Tropical-fish/auction-392213909.htm
just trying to find a use for all the empty beer cans lol
check out your local urlich aluminum or other window making factory. they often have offcuts in a bin down the back, they wont be exactly like a heatsink but they might have something that could do the job for cheep
with flash cards make then colorful like the memo cubes. and keep the information on it clear and simple, and keep the questions really clear with no ambiguity.
wood helps aswell, could try using rain water in the waterchanges instead of tap?
its always better for fish to have a constant PH rather than one that fluctuates.