Hi again & thanks Odin :)
The heater I have came with the tank - I bought the shrimp smart 30 from Aquael - I have a feeling it may be OK as UK gets warmer, but might struggle in winter as the room where the tank is is unheated at night (my goldfish bowl with the rescued Opae in are in a warm 24/7 room so dont panic!)
Two other little 'concerns' (and am SO sorry to keep asking all the time but am desperately new to all this!) the goldfish bowl with the Opae in is starting to form white floaty debris bits in since I added a tablespoon of RO water to top up the evaporated water from the original sphere. They must put something in that 'sphere water to stop it clouding when they seal them? The Opae seem ok - not as active as they were but def not popcorning, so am leaving them quiet and praying I can cycle this tank in time for them.
Second thing - the algae I had in the sphere is tiny - tried to divide it into two so the new tank could start up, but its literally all but vanished even now :( I've seen some for sale at Charterhouse Aquatics - the US shrimp site says only the tiny thin stuff will survive brackish, but I doubt IT would survive a trip from USA. Should I chance some new algae in the tank to help the cycling for my poor shrimpos stuck in the bowl? Di
http://charterhouse-aquatics.com/shop/l ... rpha-algae