the are extremely effective. I have a 20 tall on my 125 and a 20 on my fowlr
and they are great. If I did it over again I would not have a DSB
in them and run a small SB with lr
rubble and microalgaes. I have pc
lights on both and they work will. IMO
worth the money to set one up. I keep small fish in my 20 long that would not be able to make it with large fish..
I used to run nitrates in the 125 reef around 10-15 now 0 all the time and I am not the best guy for keeping up on water changes.. I also run more fish the recomended.