At a glance
Put each aquarium quote into the same comparison sheet before comparing totals. For every item, record whether it is included, an allowance, an extra, or someone else’s responsibility. Then separate the installation price from recurring care and resolve missing costs in writing.
Build a comparison sheet with six rows
Display and support: Dimensions, material, shape, stand or support scope, and the drawings used to price them.
Equipment: Filtration and other life support, lighting, controls, water preparation, and access for servicing or replacement.
Building work and finishes: Structural assessment, electrical and plumbing work, drainage, ventilation, moisture management, cabinetry, and finish repairs. Name the contractor carrying each item.
Delivery and installation: Freight, lifting or specialist access, protection of the home, installation, and removal of an existing tank when relevant.
Commissioning and handover: Testing, water preparation, livestock or planting, owner training, equipment records, and warranty contacts.
Ongoing care: Visit frequency, included tasks and consumables, monitoring, emergency call-outs, and equipment replacement. Ask for this separately from the build price.
Make the status of every item explicit
Add columns for each proposer, quoted amount, scope status, responsible party, and open question. Use the same display dimensions, system type, finishes, and care expectations in every column.
For example, one quote may include cabinetry while another expects your millworker to supply it. Add the separate millwork proposal to the second comparison before deciding which complete project costs less. This is a comparison example, not a market price estimate.
Separate recurring charges from occasional costs
Ask which maintenance tasks are covered by a regular fee and which trigger an additional charge. Record travel, emergency visits, test supplies, replacement parts, and livestock separately when the proposer excludes them.
If a builder offers monitoring, ask who reads alerts and who can attend the property. Request a written care schedule and a list of owner tasks between visits.
Resolve the differences before accepting a quote
Ask each finalist to explain allowances, exclusions, payment stages, changes, and schedule dependencies. Request a revised written scope when an answer changes what will be delivered.
Keep building costs visible even when they sit outside the aquarium contract. EPA guidance supports planning for moisture and condensation; ask the building team who specifies the relevant ventilation, materials, and water-management work.