i saw my lfs had a flame angel for $20 seeing that live aquaria has them for $50 i was wondering if these are bad for a first fish i wanted to buy one eventually anyway but my nitrate and nitrite are finally at 0 again from adding rocks and cleanup crew (and some help from my dad feeding them) would i have issues if this was my first? also i need to add some more rock would this potentially kill any fish i put in?