So, I've been reading the forum a lot and I've seen people talking about 100% water changes. Now, I'm planning to get a 2.5 gallon tank and no filter (temporary until I get a filter). I was seeing that some people advise to do 100% water changes when there is no filter. But how can you do 100% water changes in a 2.5? Is it possible to siphon out all the water and then refill it again or do you have to take out the gravel and decor and wash the whole tank by itself? Sorry for all the questions, I was just wondering how a 100% water change works. I appreciate all answers, thanks.