DWC and Bubble Cloner - need to know a few things

Well, i built a bubble cloner last night which i was quite proud of.

Construction aside, im not sure of a few things when it comes to using the actual thing.

1. For my bubble cloner, I made it using a 10L plastic container. What size airstone would be ideal??? I was thinkin just a 4".

2. Does the air pump just stay on 24/7???

3. For those who use Canna products, what line of nutrients do u use in DWC???

4. Ive asked on a coupla threads, does the bubble cloner really need the humidity dome??? One thread says it doesnt need it at all. Another says of course for mega humidity. Mixed opinion.

5. What are your thoughts on changing out the nutes??? Every week, every fortnight or never. Jus simply adjust accordingly.

Im new altogether to growing. Ive had 3 plants flowered but just in a pot full of clay balls and i wasnt very happy with the outcome. Also got a coupla mothers. A White Widow and a Cluster Bomb.

Using the clay balls in a pot seemed a big waste of nutes and led me to asking what some people thought the best grow method was which led me to wanting to do DWC.

Please lay down your thoughts. Like i said im new and any advice at all involving DWC would be greatly appreciated.

Cheers

this is the bubble cloner i built

cheers for the help people

1. 4 inch is fine. u want a dual air pump there $15 so youll need 2 stones.
2.yes
if its only 10litres i would change your water every week.

yea sweet. the cloner is only 10L but for my bigger plants I'm gonna use a 80L plastic container with between 2 n 4 plants goin. and im gonna have about 4 tubs. depends on which strain I decide to go with