Yes Mosura Graze is another type of snowflake food and it's amazing to watch it explode into flakes! It CAN stay in the tank and not pollute it altho in my experience it doesn't hang around long at all - couple of days at most.
Just a word of caution, Zik - you are paying good money for good quality and good colour shrimp, but their blood lines may be lost if you are keeping neos in together as they will breed with each other and they may revert to wild type which is not very colourful at all or you may get other colour variations, but the lovely colour you've been after won't be preserved. You may already be aware of that, just thought I'd mention it in case you didn't know.
Just a word of caution, Zik - you are paying good money for good quality and good colour shrimp, but their blood lines may be lost if you are keeping neos in together as they will breed with each other and they may revert to wild type which is not very colourful at all or you may get other colour variations, but the lovely colour you've been after won't be preserved. You may already be aware of that, just thought I'd mention it in case you didn't know.