Need Help Determining If I Can Add More Fish

[theking]

Ok so I am buying the Marineland 350gph up to 70 gallons for my 29 gallon and I was wondering, how many inches of fish can I add? I already have an aqueon 30 gallon filter which I will determine whether to use along with the marineland or discard
this is what I have

5x neon tetras
6x black tetras
2x hatchetfish
a few ghost shrimps

3x swordtails(fry, were born a month ago, giving them out this week)

please help me determine how many more fish I could add to my tank and also should I be using the same rule of 1 inch per gallon for tetras?

 

[McCool]

Forget the 1 inch rule. Not really the most accurate! You could bump up the hatchetfish number to around 6 or 8, and the neons too.
Any particular fish you are interested in? Also, make sure you have a secure lid, as hatchets are known jumpers! What is your water like? Ammonia/Nitrite/Nitrate/Ph?

 

[theking]

My tank is 100% cycled, everything is in good standing.. I wanted to have that schooling fish effect in my tank but my options are limited as I can only purchase fish from either Petco or Petsmart. I wanted to also have a medium sized fish but am unable to find something I like other than cichlids