I do not have space for a reactor, can i use ROWAphos in a net bag?
ROWAphos can be used in a media bag. As water cannot run through the media freely it is not as efficient as running it in a reactor but it will still work and be effective in controlling phosphate. Try to place the media bag in an area of the aquarium filter/sump where there is a strong flow of water as this will help to get the most out of the media.
ROWAphos is quite fine so it is important that the media bag used has a suitable weave to stop it from escaping. The 100ml and 250ml pots come with a media bag included and ROWA produce a suitable media bag that can be purchased separately (Product code RMB001). Once the media bag has been filled with the appropriate ammount of media rinse it in either RO or old tank water to remove the initial dust.