yup, dami macroalgae dun. may caulerpa, halimeda, red algae, sea grass, atbp. tyempuhan lang. i suggest, piliin nyo yung malaki ang rock na kinakapitan, pero konti ang growth. kung malaki kasi yung growth, it is because galing sila sa natural environment nila. pag nilipat mo sa sump, patay lang yun. lalo na yung red macroalgae, ambaho pag namatay, pupula pa water nyo.
buy the ones that have little growth, pero may roots. then allow them to grow at their natural pace