Coolant leaks can be extremely expensive and time consuming if not identified early. I didn't notice mine (Seidon 240M) until it had leaked on to my motherboard, GPU's, and power supply. Most of my hardware is black, therefore it was not readily apparent (even with the large viewing window on my Thermaltake Level 10 GT case). The best and least expensive fix I could recommend is including thin attachable sleeves that could be placed anywhere on the cooling tubes that are absorbent and change color when whetted by coolant. The other option would be a style of drip tray that is absorbent (not something that collects the coolant as this would be bad when turning the case on its side if the customer hadn't noticed the coolant collecting) and also changes color when whetted. The latter might restrict airflow and be cumbersome to attach depending on space allowance therefore I would recommend the former. I have read many times (my case included) that leaks mainly occur either on the tube fittings or the tubes themselves. This would allow the customer to place the attachable sleeves or drip tray at the lowest point in the system and give them an early, and readily apparent, warning sign to avoid further damage to there components. If you read this and agree or have found another inexpensive solution please post below.