my Goldfish tank before and after partial water change

First part is where i have just tossed the sand/gravel around a lot to shake dirt up and then siphoned off 30% water from the tank and replaced it with already prepared dechlorinated water from bucket. Second part of this vid is the clear tank right after 24 hours of changing 30% of water and tossing gravel around to shake up dirt/things etc. This is how the tank is almost all the time.


















