see my sig.. i have 8 glowlites + 5 cards (started with 10) they all get along well..be careful how u aclimate...but my 5 our growing + doing fine the TETRA RICH MIX flakes is there fav meal too!!! really brings out the color as it states...plan on getting a lg school for my 55 when its cycled, i waited 4 wks to add the cards in my 20gal...my ph is high too but the 5 are doing fine..good luck there the prettiest fish in my opinion...try the tetra flakes they love um!!!