HI ive have too very small ps about 1'2 " each . They are with 8 other fish and they are not bothered by them . When i bought the ps i was given 4 guppy feeders . Its been 5 days and they havent touched the guppys . My question is how long before they grow to about an inch or 2 and do they not touch the guppys because im feeding them bloodworms and flakes? Thanks for the responses !!! I appreciate it.