New triton system and high nitrates

[anth]

Im about 2months into a brand new triton system. Tank, sump, rock, sand and most equipment all new. I had a lot of fish in a temp tank and had to transfer across as quick as point of sale so used bacteria in a bottle to cycle. Everything has been in the tank and doing well for about a month but my nitrates are almost 100 using salifert test. Cheato has grown 3x in about 3 weeks.
My question is, shouldnt my nitrates be kept in check by the refugium or is it just a case of waiting for it to establish properly?
Nitrates rose from 1ppm - 100ppm over 2 weeks
Also worth noting, i have only been dosing triton acording to my alk tests every day just until alk uptake stabilises.

System
Kessil h380 fuge light
Fuge = just over 10% of tank volume
Cheato= socker ball size
Maxspect aeraqua duo skimmer
System volume = 550L
40kg live rock
No other filter media in sump
1-2 inch sand bed in tank
Above medium bio load in tank
A few corals
Sicce 9.0 sdc running at 90% for approx 10x turnover

 

[reef lover]

Might be too much for the fuge to handle. Might need another alternative like water changes.

 

[ss30]

It might have been to many fish to fast and your biological filtration might no be able to cope.

 

[anth]

Yer i think both of the above are true but thankfully over the past couple of weeks it seems to have started doing its thing as nitrates are now 0.2ppm and phosphates are 0.03ppm. This is with no water changes at all.

 

[anth]

What was your issue?