Thank you for the Info really appreciate it!
ill probably go with red belly for sure now
http://www.aquascapeonline.com/prodView.asp?idproduct=185&item=Red Belly piranha 1 and these are the ones im looking at right now
Yes and 10 red bellies for 60$ is a good deal!
But in this hobby buying the fish is the easy part! Long term care and maintenance is the always present chore!
When babies in your size tank a once a week 25% water change is fine but you also need to remove un eaten food, if you leave fish pellets or fish fillet in the tank it can cause an ammonia spike which is lethal!
1st off set up your tank, fill it with water, put the heater in it, throw some sand in it or leave it bare bottom and power up the filter, make sure you have at least 2 cups of BIO MEDIA INSIDE THE FILTER! Mechanical filtration usually comes in the form of foam padding or cotton fluff which strains the water of debris and keeps it clear! Chemical Filtration is only for certain situations such as removing meds or chemicals from the tank, most common form of chemical filtration is carbon which in a healthy tank is not necessary! Add a dozen or so goldfish to start the nitrogen cycle to jump start the good bacteria you need to have a healthy tank, after 3-4 weeks you should read no ammonia and nitrites, the only levels that should exist are nitrates (n03) you can buy a 25$ API master freshwater test kit that tests for all 3 and then some, a wise investment.
For red bellies the more filtration and water movement the better, for a 190gal you should hit 700-900 gallons per hour of filtration and when their 4" (teens or 6"+ adults) 1000gph is hugely recommended, this gives them exercise and more importantly allows the Bio filter time to process the ammonia the fish secrete to less lethal but still bad nitrite and then from nitrite to nitrate which is a lot less lethal then the 1st two! It takes at least 3-4 weeks to colonize beneficial bacteria onto your Bio media, this bacteria is what converts the toxic ammonia to nitrite then to nitrates which can easily be removed with a water change, 50ppm nitrate is probably the highest you want to go, theoretically if you do a 50% water change with 50ppm nitrates you should end up with 25ppm nitrates! This is extremely important, it reduces stress, increases activity, metabolism, growth and overall health!
I cannot stress enough how important water quality is! Next is nutrition, when young fish flake food, worms, store bought white fish fillet and or pellets is great, when older pellets and fish fillet like talapia can easily benefit a piranhas overall health and color!
My adult shoal simply gets a 1x per week feeding of cut up talapia and 1x per week NLS pellets which are extremely healthy! But none of that would be beneficial without clean water.
This forum has stickys that are pinned for a reason, go to general fish forum and read your heart out, red belly piranha will become big fish fast thus producing a lot of waste! Feed well, clean up and keep the tank consistent, don't feed things like hot dogs or hamsters, that's for people who buy piranhas for their over dramatized Reputation! These are pets and they feel pain and pleasure so keep that in mind! When raised properly with care, love and time they will become family to you, I never would have guessed or even dreamed fish could be so rewarding/relaxing!!!
On another note power heads like circulaters work great and provide excellent current that helps the fish swim/work out which is exercise! Here's a good one for your size tank (mind you it only offers current, no Bio/mechanical or chemical filtration!
http://www.drsfostersmith.com/product/prod_display.cfm?c=3578+4588+23592&pcatid=23592&r=414 I run the 1500gph model, it mounts magnetically and consumes little energy, that with a good filter like a canister or sump that pushes 500-1000gph turnover will be great and you can always upgrade the filter as they grow!
Remember read up and check out other tanks! driftwood, low light and sand (pool filter sand) accent a great red belly piranha tank! Here's my shoal eating their 1x per week cut up fillet of talapia:
https://www.youtube.com/watch?v=pMlTNLAYG8E&feature=youtube_gdata_player
You have 3-4 weeks to research this species of fish while your tank cycles! I suggest you gather and retain as much info as you can, it will not only make your life easier but also your fishes! Nothing like coming home from a long day of work to stare into an aquarium filled with predators that have razor sharp teeth in a calm, healthy and peaceful environment! Its like another world
×Go S. Vettel #1 Infiniti Redbull! 4x WDC!!! Congrats on another flawless title×
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Cheap way to decrease nitrates and keep your fish healthy: http://monsterfishkeepers.com/forums/showthread.php?t=504763 
