Looking for something to help with phosphate removal etc. just a fowler but like to have my lights on without tons of algae. Im either thinking a canister filter for some mechanical filtration then put in some chemo pure, purged etc. or a CPR refugiumLooking but it's only like 5 gallons, so not sure it's even worth while on a 75 g. No sump since tank isn't drilled and don't trust the siphon overflows. Any input?