Do you turn off your filter/heater during water changes? I always do, but I'm not sure that its necessary, mainly I just don't want my little guppies pushed around by the flow as the water level gets lower.
You should turn them off. For one thing if the heater isn't in water it will overheat as will the pump in a filter if ran to long without water. Turning the heater off is a must, it can and they do break if still plugged in out of water.
Yes! I have had to remind myself of this both times I have changed water (new aquarium, first time in the hobby)...so now since I keep forgetting I posted a note above my bucket and siphon to remind myself lol.
I don’t. I have a canister filter so easier not to turn off. I just make sure it didn’t get below the intake and suck in air. As far as the heater goes as long as you are not adding cold water as it could crack the heater due to temp difference.
If the intake tube goes below the water line, it will suck air and quit moving water.
Good heaters can go at least half way (water level) down safely.
30% water changes for me take 30 minutes at most. Just did one today. Unplugged nothing.
I never turn anything off. my heater is horizontal and close to the bottom of all my tanks and I never WC more water than the level of my filter intakes. Obviously other than doing filter maintenance then that’s the first thing I do is unplug it and put all the media in a bucket of tank water n go about my WC then clean the media in tank water and replace the polyfill... it’s always worked well for me.
Two different methods for me. I always turn filter (half hour before cleaning) to calm the water and using the air stone while filter is off to make vacuuming easier (makes everything settle to the bottom). I turn heater off completely while vacuuming and anything more than a 50% water change I shuffle it lower to water level when refilling with prepared water from the night before to be sure to dechlorinate thoroughly. As I refill I shuffle heater down to water and slowly raise it with the water level as it rises to make sure if water is cooler then should be it heats it as it fills. But to each their own.