Compare custom aquarium proposals by normalizing the scope before comparing totals. Put the display, life support, building work, delivery, commissioning, livestock, maintenance, warranties, exclusions, and responsibility boundaries side by side; a lower total may reflect a different or incomplete scope.
Normalize the base scope
Create one project brief and ask each proposer to identify what it includes for the display, stand or support assumptions, filtration and other life-support equipment, controls, cabinetry or finishes, water preparation, delivery, installation, testing, and commissioning. Flag any item that is described differently or omitted instead of treating proposal totals as directly comparable.
Separate aquarium work from structural, electrical, plumbing, drainage, ventilation, waterproofing, finish, access, permitting, and general-contractor work. Ask which party carries each responsibility, what information or site conditions it depends on, and how changes will be documented.
Compare the ownership handoff
Ask whether livestock, acclimation, maintenance, water, consumables, monitoring, training, documentation, warranty support, and scheduled replacement items are included, optional, or excluded. Use the proposal to set project-specific ownership costs and replacement intervals.
Before authorizing work, resolve delivery routes, service clearances, access to equipment, drain and leak-response planning, and the records supplied at handover. EPA guidance treats controlling unintended moisture, indoor humidity, and condensation as building concerns that should not be left implicit.
Use questions, not a generic price benchmark
Ask each proposer to explain material differences in scope, exclusions, change handling, schedule dependencies, and who will coordinate affected trades. Request clarification in writing when an allowance, qualification, or interface is unclear.
Do not use a per-gallon figure, online calculator, or another project’s total as a substitute for a comparable scope. Obtain project-specific advice from the professionals responsible for the relevant design, construction, tax, insurance, legal, and animal-care decisions.