Ryan- Watch out for the ammonia that is sure to cause you problems. It could kill every last one of the tilapia if not kept in check. Have plenty of water ready to change if you do have a problem. Ammonia levels will top out at about 6 days if your filter is large enough to carry the load of 300 fish. If not it will last much longer. Neutralizing nitrosomonas bacteria grow quickly and lead to high nitrite levels which are also toxic and take up to 18 days to peak and establish the nitrobacter needed to change these to non-toxic nitrates.
