Costs
Fixed costs
Current material at current minimal price (find online, check with local fish store):
SUMP DIY -> TBD but before as canister filter: Fluval FX6 -> 2x 250€ (e.g. here)
Lighting system Chihiros WRGB II 120 -> 2x 350€ (e.g. here)
Heating Aqua Medic Titanium 200W -> 2x 30€ (e.g. here) + Inkbird Thermostat -> 2x 35€
Ozone Aqua Medic 200 -> 1x 260€ (e.g. here)+ reactor Sera 500 -> 2x 25€ (e.g. here) + UV sterilizer Aqua Medic Helix Max 11W -> 2x 90€ (e.g. here)
Nitrate absorber 6L Rhein-Erft Aquaristik -> 2x 90€ (here) + 12x 15€ (here)
Return pump Aqua Medic DC Runner 5.2 -> 2x 150€ (e.g. here) + stream pump Aqua Medic EcoDrift 4.2 -> 2x 90€ (e.g. here)
Air pump Eheim Air500 -> 2x 45€ (e.g. here)
Total, for both tanks -> 4010€ with DIY filter or 4510€ with with FX6 filters.
On top, keep in mind:
Upgrades done on stand: from wood panel to alu profil structure (see v1, v2, v3)
DIY SUMP (see www.diyaquariumfilters.com)
This approximation is already a good indication of budget range to get similar result, if it is what you're interested in ;-)
Recurring costs
Water consumption
Automatically replaced by RO water from 40L reservoir RO
Discus -> 7.28m³/y at 0,856 €/m³ -> ~6€
Water change: 200L/2w
Evaporation automatic top-off: 40L/w
Tropheus -> 2.34m³/y at 0,856 €/m³ -> ~2€
Water change 200L/2m
Evaporation automatic top-off: 40L/2w
Power consumption - Jan. 2021
(Following screenshots are from Mi Home smart plug, more info on www.miaquarium.com)
Clearly heating (Aqua Medic Titanium 200W + Inkbird Thermostat) impact a lot, with clear difference between Tropheus (25°C) and Discus (29°C).
Interestingly lightning system (Chihiros WRGB II 120) setup very softened (~30%) is visible in the afternoon, 16h -> 22h.
Discus -> 151.2kWh mth at 27,85 Ct/kWh (LEW) -> ~42€
Tropheus -> 77.5kWh mth at 27,85 Ct/kWh (LEW) -> ~22€
Operating supplies
UV lamp -> renew each year 11w -> 20€
Filter roll paper -> 40m 10€ (here)
Discus (and L-catfishes) -> 2mth
Tropheus -> 6mth
Salts water preparation -> related to water change
Topheus tank - monthly
Tropheus tank - daily
Tropheus tank - hourly
Discus tank - monthly
Discus tank - daily
Discus tank - hourly