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Coastal Reef 40B

40 gallons · Mixed reef · Moderate maintenance · Intermediate

System stable

Tank photo

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Water parameters

Last test: this morning

Salinity

1.025 sg

Target: 1.024 – 1.026

Alkalinity

8.4 dKH

Target: 8.0 – 9.0 dKH

Calcium

430 ppm

Target: 400 – 450 ppm

Magnesium

1340 ppm

Target: 1300 – 1450 ppm

Nitrate

8 ppm

Target: 5 – 15 ppm

Phosphate

0.04 ppm

Target: 0.03 – 0.08 ppm

Temperature

78.2 °F

Target: 77 – 79 °F

pH

8.15

Target: 8.0 – 8.3

Guided recommendations

Alkalinity drifted 0.4 dKH this week

Consumption appears to be increasing as corals grow. Consider a small uptick in 2-part dosing.

Nitrate trending up slowly

Still inside target range. Worth tightening feeding portions or extending water-change cadence next month.

Stable temperature for 14 days

Heater controller is holding tight to 78.2 °F. Nice work.

GuidedReef is an informational and organizational tool. Recommendations are based on common reefkeeping best practices and should always be verified before making livestock, dosing, or equipment decisions.

Alkalinity — last 14 days

Slight downward drift over the last week — coral consumption appears to be rising.

Maintenance schedule

  • Test alkalinity, calcium, magnesium

    Today

  • 10% water change (4 gallons)

    In 2 days

  • Clean skimmer cup

    In 5 days

  • Replace filter floss

    Next week

  • Inspect return pump & powerheads

    In 2 weeks

Livestock

  • Ocellaris Clownfish×2 · Fish
  • Royal Gramma×1 · Fish
  • Yellow Watchman Goby×1 · Fish
  • Pistol Shrimp×1 · Invert
  • Cleaner Shrimp×2 · Invert
  • Emerald Crab×1 · Invert
  • Trochus Snails×6 · Invert
  • Green Star Polyps×1 · Coral
  • Hammer Coral×2 · Coral
  • Zoanthids×3 · Coral

Equipment

  • AI Prime 16HDLighting
  • MP10 wQDPowerhead
  • Reef Octopus 110Protein Skimmer
  • Sicce Syncra 2.0Return Pump
  • Inkbird ITC-308Heater Controller
  • TridentParameter Monitor

Water changes

Last 5 weeks
DateAmountSGNotes
Jun 154 gal (10%)1.025Standard weekly change
Jun 84 gal (10%)1.026Vacuumed sand bed front third
Jun 14 gal (10%)1.025Replaced filter floss
May 256 gal (15%)1.025After algae bloom
May 184 gal (10%)1.025—

Dosing schedule

  • Tropic Marin All-For-Reef

    Daily · 9:00 AM

    8 ml

  • Brightwell Microbacter7

    3× weekly · After WC

    2 ml

  • Red Sea AB+

    Daily · Lights on

    0.4 ml

  • Seachem Reef Iodide

    Weekly · Sundays

    1 ml

Maintenance history

Last 3 weeks
  • Jun 18

    Tested Alk / Ca / Mg

    8.4 / 430 / 1340

  • Jun 15

    10% water change

    4 gallons RODI + salt

  • Jun 12

    Cleaned skimmer cup

    Heavy skimmate, dialed wetter

  • Jun 10

    Replaced filter floss

    Weekly cadence

  • Jun 5

    Glass cleaning

    Magnet + blade on front pane

  • Jun 1

    Inspected return pump

    Rinsed impeller, no wear

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