Skip the pain of constantly upgrading and get a 6'x18"x2' aka 125gal or 4'x2'x2' aka 120gal with a big canister (fx5 or 6/eheim 2262/sump) and a 1200-1500gph circulator, preferably hydor evo series and a jager 300watt heater is fine, all this apart from the 125 can be found at petmountain.com or drfosterssmith.com with free s&h.
If on a budget look on CL or classifieds for the tank and filter, eventually one will pop up, negotiate and your good. Pfs is a cheap substrate that utilizes the filter as the **** doesn't sink into gravel and of course pothos will help with nitrate reduction aka less wc.
Trust me my shoal started out in a 55 transferred to a 90 then finally to a 125, its a ***** moving healthy/active adult Rbp.
And lastly if you don't have the means to provide a big enough forever home get rid of two of them or their gonna Max out at 6" or so. I've seen 3 yr old rbp at 6" a couple times kept in small conditions.
Lastly/lastly the best thing to do right now is keep nitrates <30ppm meaning at least bi weekly 50% wc in your case. Try and match fresh water temp with tank water to reduce stress and keep temps <77°!
Here's my shoals forever home
×Go S Vettel #1 Infiniti Redbull! 3x WDC!!!×
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Cheap way to decrease nitrates and keep your fish healthy:
http://monsterfishkeepers.com/forums/showthread.php?t=504763 
