You cant really house any shoal for life, rbp max at 10-12", you 55 is 12" wide. However you could raise a shoal of 3-4 rbp for 6-10 months with the 55 then upgrade to a 75 then... That gives you time to figure out upgrading and rbp are very hearty and will do fine! Aquascapeonline has a great deal on many rbp for cheap!
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http://www.monsterfishkeepers.com/forums/showthread.php?504763-Cheap-plants-less-nitrate!-POTHOS
*Go S. Vettel #1 rb8--2 MORE RACES LEFT! SEE YOU IN TEXAS BOYS! LET'S MAKE IT 3 BACK TO BACK WDC!*
