Today i brought home my first goldfishes! I got 2 calico pearlscale, a black tailed telescoping eye and a black moor. Sadly, to keep myself sane with all my betta kids, I needed a tank that was betta free!! Sorry to all the betta owners out there! I dearly love breeding and just plain having my house full of bettas, but needed a change to keep from getting burnt out! I honestly have never had goldfish before, so I have a few questions.. 1. I know they will need a bigger tank in the future...they will be moving to the big hex tank once I get the leak sealed...but for now they are in a 20gallon. The tank has 3 balloon mollies in it and has been cycled for over a year... Should thatwork for a month or so? 2. The substrate in this tank is natural sand...from my yard which is ALL sand.. is that ok, or do I need to change that? 3. Should there be any confilct with this mix?