hey guys so my jack dempseys are not very colorful and someone pointed out that since my gravel is brown it wont have there color pop so i went and picked up some black gravel, but is gravel better or should i go with sand, currently i have a aqueon water changer with a 25 foot hose that i use to clean my gravel, i was worried this would suck up the sand. also im not sure which one is ideal for JD thanks.