*Bare bottom with not enough nutrients

[Alysiak00]

Hello all. I'm currently running a 40b with 40b sump, total volume of around 70g. Currently I'm noticing that pretty much all of my corals have not grown almost any in the last 6 months, softies, Zoos, and sps included. After doing some tests with multiple test kits I'm beginning to think I'm runningtoo clean of a system and my nutrients are too low. Corals appear to be a pale off color toe and others are slightly brown. I've currently been trying to feed once a day (flake and filter diet) and feed a mysis cube every other day to up my nutrients. Any other ideas or do you guys think it's something else? TIA

Parameters
Salinity 1.025
Ammonia undetectable
Nitrate zero
Nitrate zero
Ph 8.1
Temp 78.4
Calcium 445
Mag 1500
Brand new Phoenix 14k one week old. Replaced 2 yr old ushio 20k
250w maristar with bluewave ballast
2x24w supplemental t5
Halide on for 6hrs, t5 on for 8hrs
Dry skimming, cleaning cup once a week

 

[ridetheducati]

I suspect your phosphate levels are zero as well. You may notice some growth since you recently replaced your bulbs. Try not to go beyond 12 -16 months for bulb changes, especially for 20k bulbs.

Increase feeding and try a frozen food such as Rods food that has a variety of content to feed everything in your tank. Try amino acids as well.