Got rid of MPI 41 and got a enerco blue flame wall mount to supplement wood heat. 100 gal tank was delivered with 6gal. Two weeks later they still havent filled it up and have used it several times. I now have a orange flame. I suspect low gas but couldnt get anything on google. not real orange but maybe purple mixed in. just lit it snd bsck to blue after a warm day. Is this pressure related due to low gas levels?