for the 125 and 55g a python is a must here. I still use bucket and gravel vac for the smaller tanks. if i just want to refill the tanks with water and not gravel vac i would use a hose.
I use a standard gravel vac to clean the gravel, then I have a quietone 1200 pump that I attch to a garden hose and I use that to pump the rest of the water out, the use my hose to refill. Posted via Mobile Device
i once had a little blue that i got for .50 somehwere and it was like this double ended thing where u can connect and extend a gravel vac too and then i just bought inch thick tubing and attached it to the other end so i was able to use the gravel vac suction and the water just went through both the siphon and the tubing extension and to the sink.
I use a garden hose submersible pump to pump water into my backyard. For refilling i put a pex water line piped into my tank, all i do it turn a ball valve on and i have warm water. If i vac the gravel i just use a gravel vac and bucket