was doing some looking online and found an interesting take, or another explanation for low flow in the sump. here it is paraphrased.
for the skimmer you want to match or slightly slower flow than the skimmer pump. reason for that is if your flow is too fast through that compartment the skimmer will not be able to pull everything that it can POTENTIALLY pull out. the faster flow will only allow it to grab a smaller percentage of water than slow flow. kind of like a side channel in a fast moving river. gets some but the rest of it passes it by.
another point brought up was that a lot of us use a dsb
in our sumps. we use them to remove/reduce nitrates. the point brought up was that we create circulation in our dt's to not only flow water to all filter feeders and deliver nutrients to all of our corals but to keep waste dissolved and suspended in the water column until it is overflowed into the sump to be filtered out. the slower flow through the sump allows for all of these dissolved wastes to fall out of suspension and onto the dsb
. letting all the micro fauna and the bacteria to do its job and further break it all down.
while i keep reading that certain nutrient exporting macro algae requires higher flow to remove the nutrients in the water, this current is counter productive to the rest of the sump requirements for slower flow. hence there arises a need for yet another compartment for macro algae to be placed with the lighting and a power head to boost circulation back up.
after all that, here is my take on why my sump configuration isnt working all that well. ive got a 40 breeder as a sump with a mag 9.5. the pump is too much flow for proper nutrient export by my dsb
and affects the efficiency of my skimmer but the sump is too wide to create enough current for the needs of the macro algae. my plan is to get a pump like a quiet one 2200 or a mag 5. some where in the 550 gph
range. that should put my post head gph
at around 150-200 gph
range in my dt. i built a wall out of rubble in an attempt to isolate my macro from as much dsb
as possible while still using one of nano 425s to circulate the water for the chaeto. atleast until i can put a more permanent panel in.
plans still remains for two 750 power heads or maybe one 750 one 550 for my dt.
any one have any input on all of this? good bad or indifferent?