I was ready to order the IceCap 4ks today and came across a huge limitation of this product. If you have a large tank, in my case 8 feet long, they simply won’t work as their cord is only 6 feet long and you cannot buy an extension cable. Unless of course you have some way of mounting the controlling in the middle of your tank. You should note, that you can buy an extension cable for the Maxspecct Grye.