$res = mysql_fetch_array(mysql_query("SELECT `money` FROM `fish` WHERE `user_id` = '".$user_id."' LIMIT 1"));например менять на
$res = mysql_fetch_array(mysql_query("SELECT `balans` FROM `users` WHERE `user_id` = '".$user_id."' LIMIT 1")); ? $res = mysql_fetch_array(mysql_query("SELECT `money` FROM `fish` WHERE `user_id` = '".$user_id."' LIMIT 1"));$res = mysql_fetch_array(mysql_query("SELECT `balans` FROM `users` WHERE `user_id` = '".$user_id."' LIMIT 1")); ?