Im finding it hard to believe your nitrates are at 0 "lol", Anyway to the point. firstly your SG is "Ok" but for best results id get that up just a little bit higher. Next thing is your pH, if your using liquid buffer your wasting your time, get some good powder buff mix it with a small bit of tank water and add it to the tank, it works like magic (: the liquid buffers are useless.
My first ever marine aquarium was and still is a biOrb 60l, its not a tank that many people recommend and there is alot of anti-biOrb people.Its ok for "experimenting". But if you want to go way out with skimmers and corals and stuff id advice getting a nano cube or an orca ;)
Its not necessary to use RO water for FOWLR but if you want a non-algae aquarium, dont want to cleaning your aquarium every week then i would advice to get RO water, its very cheap from your lfs and can be put straight into the aquarium rather than the need for dechlorinator. Its also alot better for the fish, inverts etc..
The original BiOrb halogen light isnt even strong enough to keep any types of corals/anemones etc.. marine biOrbs are FOWLR tanks and the biOrb LED light was only made as far as i no for cold water and tropical aquariums. I wouldnt recommend keeping anemones in a biOrb nor would i recommend using the LED light in a marine aquarium. As much as it looks fantastic unfortunately its not sutable what so ever for any type of marine/reef aquarium
Hi, Im new to the forum, first post actually, Anyway.. I no the biOrb 60l Is not exactly recommended for marine fish keeping, But i am only keeping 2 clown fish and afew crabs and thats my limit! Iv heard the filter isn't exactly brilliant in the marine biOrb 60l, But is there anything beside the biOrb filter and 4KG of cured live rock i can add to the tank to maybe filter the water a little bit better? Iv heard of alot of people scraping the biOrb filter and using a powerhead or some other custom filter. Whats your advice? should i add a powerhead to the tank or is it useless as the biOrb marine 60l is only a ROWLR tank?