thanks! yeah, they are definitely filling out the tanks...that is another reason why i am cutting the study short of two months (will be more like 7 weeks) as i don't want to keep them all cooped up in too small of tanks. at the same time, bumping them all to bigger tanks and continuing would add another variable to the current simple study.
as soon as i figure out all the details, these guys will all be combined in a bigger recirculating system or indoor pond setup. their feeding will be reduced from ad libitum to more maintenance/"standard" growth levels so we can use them later down the line.
Richard will be coming over on Saturday so i am hoping to get him to help out with the final measurements

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--solomon