Hello I've been considering getting a fish tank for a while now,and finally decide to do some research. I have a few questions that I was wondering if you guys could answer.(actually a lot,sorry.) 1) Will my fish do well together? Here are some I've been considering. a)Cobalt Blue (Powder) Gourami b)Pygmy (Sparkling)Gourami c)Cardinal Tetra d)Bleeding Heart Tetra e)Black Phantom Tetra f)True (Banded)Rummy Nose Tetra g)Neon Tetra h) Orange Sunshine Guppy i)Lyretail Guppy The Bleeding heart tetra is the biggest right?Will it eat/attack the smaller ones? 2) I've read most of those fish prefer schools of atleast 6 fish,do they have to be the exact same species ex. 6 neon tetras or can I have similiar species in a school ex.3 neon tetras 1 bleeding heart tetra and 2 black phantom tetras? Also,once my aquarium has completed the cycle,I'm only supposed to add around 2 fish at a time won't this bother the schooling fish? 3)How many fish of those sizes(2-3") can I keep in a 20 gallon tank;a 30 gallon? 4)What type of filter would you reccomend? 5)What type of heater? 6)Live plants or fake plants? 7)Most of those fish prefer pH levels between 6.8 and 7.0,except for the cardinal which prefers 6.0,will all of those fish be okay with a pH of around 6.5,or should I not get cardinals? 8 ) How do I change pH levels will it occur naturally like ammonia and nitrite during the cycling process? 9)Are there any other chemical levels I need to worry about? 10) Thanks,and I'm really sorry for all the long questions. P.S. I got most of the info on pH levels and fish sizes from aquahobby EDIT: BTW those fish aren't for the cycle,I plan on doing a fishless cycle.