i have been busy lately. i bought a marco AS 350p a month ago, hang one venturi.. i use resun 2600 sp. it is ok. a cheap skimmer that can dial wet and dry skim but the only thing that trouble me a is the skimmer will react to water level changes. And another weakness from this product is will never have thick MUD on the neck of the collection cup. this is just like tunze.
gunzo. man your sump is so small and the water level is a bit high. that makes your tunze look like piece of crap. i think you need to adjust your position of your tunzee, lift a little bit up. i also see that your skimmer compartment does not maintain a constant water level.
so i think you better check it
about your nitrate, hmm.. what can i say...... weipro somehow better???
anyway, i orderi order H&S ap 150, external. will report to you gunzo.
by the way, how is the new needlewhell skimmer?