Sorry everyone, please don't get me wrong. I am not unwilling to make change for my balls. I love all my pets and I want to give them the best environment. I just ‘misunderstand’ my balls as ‘living happily together with a buddy around’. I have a smaller cage at the bottom rack for feeding them separately. I was reluctant to put one there because the tank is small (I asked the pet shop few months ago when I wanted to get them a new tank. The guy said this size (60cm x 30cm) is too small for my balls.) and I don’t have an extra hide to put in there. I can use this now but I still need to think of a solution as there is no space to put heating light on this small tank for winter as you can see in the picture. But to take all of your advice, I now put one down there. I will try to find someone to get them sexed as I really want to be sure if they are two boys or not.

Crazymonkee : Thanks for telling me that.... I have never thought these behaviours represent competition. I really think they love each other as buddies like my doggies do.

satomi325 : the tubs in the pictures are very nice!! I have never seen such a long tub here. I have big tub for moving home and keeping stuff but not as big and long as the one showed in the pictures. The bottom of the biggest tub I have is only 50cmx33cm floor size (but very tall). This one is already the biggest one I found in the household shop.

angllady2 : Thanks for your understanding. Yes, keeping reptile pets here is not as common and popular as in US : less than 20 shops sell reptile pets here in HK and only a few of them sell snakes, and as I know, only 2 animal clinics treat reptiles. Also because the apartments in HK are very very small compare with those in the US and UK. To match with the market, the tubs selling in the shops are not that big. I do think I will not be able to find two tanks of similar floor size but not that tall because when I bought the present tank, I searched for many shops and they are all very tall. No particular tank is tailored for keeping snakes but generally for all kind of reptiles. Only two shops said they could help me (sounded unwilling to when I asked) to find someone in Mainland China to tailor-made one, but as I said, the cost will be more than US$320 (not including delivery).

southwind: Is that really enough space for them to move around in each tub? I am now putting one in a small cage and will think about how I should set up two tanks or to get something else. I will take a look on the net to see if it's possible to buy the tubs online. Oh, I am not using UV light. They are Zoo Med Nightlight Red 100 Watts and 75 Watts. I use them in the winter, depends on how cold the day is.

Parysa: I will check online to get something suitable. I surely want to give them the best environment. I didn't know they don't like each other.

treeboa: It's ok. I am glad to have received so many replies. I have never talked to people on any forums about my balls. I got simple instructions from the pet shop long time ago when I bought my balls and that’s it. In these 12 years, they are always healthy, clean, eat well, shed well and grow well, so I have never thought that they are not happy. I haven't turned the under tank heater on as here is summer time. I clean the tank and the carpet once they wee or poo, but rarely use bleach. If this is related to heat, may be it was because of the heat from the sun. As I found them not eating, I wondered if it was because the room was too dark and not enough fresh air, I placed them in the small cage and put them at the balcony for fresh air and get some natural light & heat for three afternoons. If the reddish still not go, I will take them to the vet.